MicrostockGroup

First thing i do is send them this link

http://arenacreative.com/blog/photography/microstock-related/can-you-really-make-a-living-selling-microstock-photography/

They never ask again for some reason 

Wow, you guys are really nice people.  I don't bother tutoring people to take my job.  In fact, I am kind of insulted when some relative or acquaintance assumes that just because I make money in microstock, it's super easy and they can do it with their new digicam or entry level plastic DSLR.  I don't assume that just because my cousin is a successful chef that I can do it because I get compliments on my spaghetti sauce  

The rare occasions that people in the real world express interest in getting into stock photography, I suggest they try Shutterstock, Istockphoto, and Alamy.  I tell them to submit their very best work.  Beyond that, they are on their own.  The few that have bothered to apply have all been rejected.  They see it's not as easy as they thought and give up.

Early on, on Istockphoto, I used to give advice to newbies on my creative network.  Unfortunately, several of them began using my portfolio as their personal source of inspiration.  About the third time that happened, I stopped my "mentoring" activities.  

you could offer to submit their work for them and take a sustainable 85% of the earnings.

Perfect Lou!  I'm gonna try your method next time

Speaking as an microstock illustrator who also works for microstock photographers on the post-production/submission side, I'd tell them it's grueling, takes a full-time amount of attention and you better adjust your lifestyle to very low standards. However, the reward of full control and the reward of not being at the mercy of 1 client for your projects, is almost worth it.