Yes, you can try to do so.
But, like cuppacoffee said, this can easily be removed with Photoshop.
And people who visit your website because they are interested in your photos, become irritated about your big tattoos and go elsewhere!
They come to see photos and see only tattoos! No win/win situation!

I have done my thinking about this and decided not to publish anything on the web or publish and not to complain about theft.
Don't publish too big images and don't use a high dpi. Use a watermark but don't put it too prominently in your image.
When you see your images used in an illegal way: see it as free publicity and went on to do your doings. Until the time there will be a worldwide photographers union to help protect your rights there's nothing else that can be done.
For what it's worth this is the best advise I can give.

And about your website: a friend of mine has a website (that is build for him by a company) to promote his business.
It is completely copied. Everything! And the person who stole it published it with the brand name of his own company in it.
Exactly the same website including all the colors, fonts, photos etc. He is ignoring all the letters about this. It is in the same country, so my friend propably could start a lawsuit. Which will cost him a lot time and money. Of course he will win and then he can start the next lawsuit for the next thief. He decided to went on with his business. (We do not have big claims her like in the US to avoid people from doing this kind of things, perhaps that makes a difference too).

Of course it's all wrong and of course it's theft. But what can you do except not complaining?

Yes, this can be done, I know.
But you can only download the webversions of the images, can you? Because that is the only image that can be found on the website.
And by up-scaling them you can never get the quality of the original image.

So who cares if children use them for their schoolwork? Or something like that?
I have seen such images downloaded and used for desktopimage stretched out over the whole screen!
And they are used to make sentimental stories with text and music in Powerpoint and then send them over the internet to tell everyone to be ..... or to do .....or to show ..... (fill out on the lines what you like). ;-)

You made a video of a christmas tree with lights and are asking if someone can give you a light? That's funny! :-)
When you can not do it with your computer try to find someone with a Windows Vista or Windows 7 pc. Perhaps they do the job.
 

Cushy stock for managing all photos and stocksites and most of the other options it has in it. Picniche for all its options, only not for FTP upload and Filezilla for uploading to a few sites that does not work with my version of Cushy stock. And sometimes Adobe Bridge for the repair of problems with XPM and IPTC keywording. All of them does a good job for me.
At the moment I'm doubting if I would do better to use XMP instead of IPTC for keywording all my new images.

I am using Cushy stock 1.8.5 and I can upload to Yaymicro without any problem.
You can mail Alex Bakulin on the Cushy stock website or the forum about your problem.

With Cushy Stock you can upload one image to multiple sites with the Cushy Stock Lite version.
After uploading close the program, start it again and upload the next image.
Not very useful when you want to upload a lot of files. Very time consuming.

With Filezilla it seems that you can schedule your uploads. Try this topic: How to schedule uploads with filezilla by greener.
Otherwise use the Search option to find that topic.
Filezilla is freeware.

There's IPTC and XMP. XMP is used by Adobe (Adobe Bridge and Lightroom) to store keywords (and also by Istock).
Irfanview uses IPTC.
I had problems with double groups of keywords until they told me that one group was in the IPTC and the other in the XMP of the photo.
For I didn't know this before I wondered why only my older keywords did show up on some stocksites like Istock and I had to copy and paste the newer ones.
Cushy Stock also uses IPTC. In the next version of Cushy Stock there will be ability to show metadata separately for IPTC and XMP.

I use Cushy Stock too.
As far as I can see it does most of the things I wish for and the rest I asked Alex Bakulin, who wrote the program, to change or add things if possible... 
(He's working on a version for Mac an Linux too.)
My workflow: when images are ready I save them to submaps on my harddisk in a map called "Photo's Stock" and when I start Cushy Stock I can automatically find them like in Windows Explorer. They are viewed by thumbnails and with their filenames.Then adding keywords, titles and descriptions. I can do this by copy and paste. Also possible to copy and past whole sets of keywords to a bunch of images. When copy and pasting two sets from different images together to a new image nothing is double copied. Then I can simply add some more keywords or delete the ones that are not correct for that image. Works fast and easy. Also there is a keyword generator. You can choose if you will have the keywordgenerator based on Dreamstime or on Shutterstock. I use Dreamstime. Then I select the whole group of images which are ready (same way as in Windows Explorer) and for the stocks I wish them to upload to I put the settings: "Ready to upload". Then close Cushy and start it over again (otherwise it gives a problem on my computer, don't know if others have that problem too), I open the wizard, select the images that I set "Ready to upload", take a control if I did not forget to fill out anything and click: Start uploading.
All the selected images are now uploaded to all the selected stocksites and I am going to do something else. When ready they are automatically set "Pending" for every site. Now I only have to submit them on the different stocks. When they are accepted I set them "Accepted". Otherwise "Rejected" or "Resubmit", depending on the problems that are found by the reviewers. When clicking on an image I can see immidiately the results for every stock. Also when uploading of an image has failed it is automatically set : "Upload failed". Reasons given for rejection can be written at "Comments", so by clicking on a image I can see the whole list of reasons for rejection from the different stocksites for every image apart in a list.
When I click on the different Stocksites on the left, I can see the maps with "Accepted", "Ready to upload" etc. for that stock. Also I can update financial statistics for the supported sites by one click and simply back up everything bij copying only one file  (Cushystock.dat) from the program to 2 other harddisks. I have set my my backup program to do that automatically every day, together with all my images.
The program is also translated in different languages. Also it's possible to add Stocksites by yourself.
There are a lot other options. Some I don't use, some I didn't explore yet.
I have searched the web for programs that do the same thing for stockphotographers, but could not find anything until now.
When there are more people who are using this program: Would you like it if there is a topic started to ask questions about "How do...", or discussing workflow problems? It costs me some time to learn to work with it, perhaps I can be a help for others and perhaps some of you will have answers for me...
There are also some bugs in the program yet. For that reason I use version 1.8.5 and not the newer versions. I did not try the newest versions (2 and higher).
When FTP is not supported by a stocksite, or it doesn't work well, you can do the settings by hand for that sites. Not a big problem, but costs some extra work.

I hope you understand my bad English and the info is helpful for someone...

Common sense and a sense of humor
are the same thing,
moving at different speeds.
A sense of humor is just common sense,
dancing.

-- Clive James

Last weeks when I was reading on the SS forum, everyone seem to be a little bit bored. "Show me your last download", "What is your last upload"....etc. 
I think everyone has been awaked now! SS throwed a really big stone into the pond! 
There are topics started in all kind of languages!

Nice to see you here. You brought a lot of humor to SS forum...
Hope you will be back there soon.

No problems here with Cushy stock at all. It updates financial statistics from Shutterstock as it did before.
Strange enough FTP uploading to Shutterstock doesn't work here.
Anyone who uses Cushy stock who knows how the settings has to be filled in in the program?
The other stocks do work well with FTP, so I can't find out why Shutterstock doesn't..

Quote from Shadysue: "I'd imagine that most of the companies which use Yuri's kind of image are percisely not the little 'mom and pop' businesses that iStock mainly supplied in the beginning, so they'd be able to make the budget available to buy from the macros."

Sorry if I understand you wrong, but that's what I tried to say. If you have to start today a company like Yuri's you have to be rich enough at start. And if you are rich enough: for what reason should you join microstock? So who is able to fill the need for that kind of images in microstock, when all that photographers move to macrostock?
When you start as newbie you get the lowest prices for your images and it takes time to see your income grow. I don't think a newbie can ever reach the level that the topcontributors has build up in the "golden years'.
But what about the midgroup? Those who do this for years, make a living out of it... Are they able to fill the hole if the topcontributors move to macro?
What I has read is that a lot of them also are trying to move to macro- or midstock already. And it's not only the quality, but also the quantity that is needed. All stocks ask for "people, people, people', but you can not produce that cheap and you can not produce enough!
What is the reason for a midstocksite as Zymmetrical to start just now? I have read that he has been in the stockworld for seventeen years. Does he see this situation coming? That there will become a lack of high quality images on micro in the near future because of the mid- and topphotographers stop uploading them to micro. And the reason they stop with micro is that the costs to produce their images are to high for the income they get from them?
And what someone said about Dan Heller seems also true to me. Most people don't expect to get top quality when you can get something to a bottomprice. Why should buyers of images think different? We know that the accepted images on stock are of good quality, but do they believe if they can get them for 30 cent?
But perhaps stocks don't care about long term thinking. When they earned enough they simply sell it, like Istock. :-)

Yesterday I got a rejection for 'an unacceptable amount of purple fringing' on an image with a field of purple hyacinths! I am laughing about it for 24 hours now!  And indeed looking at 300% or so, I can find a little bit purple that seem not to be original to the flowers. Using software removes all the purple from the image and cleaning up half a million tiny hyacinth flowers by hand... no, I don't think so!
Of course there's nothing wrong with your image. Demanding this level of perfection is deadsting to creativity. Perfect beauty is boring.  And when you might ever reach that level they sell it for 0,30 ct....
These rejection reasons seem extreme to me and you need to have a little bit of sense of humour when uploading to Istock!  (and not only to Istock...! 

I was asking myself what was going on with all the stocks, but now I know: the easter-bunny! 
To Gaja: I suggest to do your duty to your people and country and went to a cabin etc.... To be send in exile won't guarantee you water and electricity either...