No, it's not legal. If you find one of your images, send Flickr a take-down notice and they'll remove the offending images. If they get enough notices for a particular account they'll just delete the entire account. I found a couple of my images there so I'm doing that now. Here's what they sent me after I emailed them the first time:
Hello,
Thank you for contacting Yahoo! Inc. ("Yahoo!"). Yahoo! respects the
intellectual property rights of others and we ask that our users do the
same. Yahoo! has established a policy for receiving and processing
notifications of infringement in accordance with the Digital Millennium
Copyright Act ("DMCA"), other applicable laws and/or Yahoo! policies.
Your recent correspondence was insufficient to constitute an effective
Notification of Infringement ("NOI") within the meaning of the DMCA
and/or as required by Yahoo! policy. The elements required for an
effective NOI, and the contact information for submitting a NOI to
Yahoo!, are included below and at
http://info.yahoo.com/copyright/details.html.If you are the copyright owner or are authorized to act on behalf of the
copyright owner and you would like to submit a NOI in response to this
email, please include the following:
1. A description of the copyrighted work or other intellectual property
that you claim has been infringed;
2. A description of the location where the material that you claim is
infringing is located;
3. A statement by you that you have a *good faith belief* that the
reported use is not authorized by the copyright or intellectual property
owner, its agent, or the law;
4. A statement by you, *made under penalty of perjury,* that the above
information is accurate and that you are the copyright or intellectual
property owner or authorized to act on the copyright or intellectual
property owner's behalf; and
5. Your address, telephone number, and email address;
6. Your electronic or physical signature. If the submission is made
electronically, please designate your electronic signature by typing a
forward slash ("/") before and after your name and follow this
electronic signature by again typing your name. For example:
/Jane Doe/
Jane Doe
Please note that attachments cannot be accepted due to security
concerns.
Once Yahoo! has received a NOI containing each of the required elements
detailed above, Yahoo! will process your request.
We wish to thank you in advance for your anticipated cooperation in this
matter. Please contact us if you have any questions or we can further
assist you in this matter.
Regards,
Copyright/IP Agent, Yahoo! Inc.
[email protected]****************************
c/o Yahoo! Inc.
701 First Ave.
Sunnyvale, CA 94089