If you really read the facebook agreement that you have or will have to sign, you basically have no rights to your pictures, info, etc. They can resell, reuse, and abuse, any of your images, and you have NO RECOURSE.

I agree with Phil C, knowing when seven layers of friends of friends are taking a dump, is not productive, or when they are "so stressed out they cant go on" (Done in my best valley girl impersonation) is a waste of time....are you really wanting to target market these people, or artists that might really use your products. 

But the everything on facebook can be used in any manner by facebook without recourse is the absolute deal breaker for me IMHO.