Which leads me to my next statement. Vb.org may be guilty of overlooking copywrited images and images with the styles submitted here. I could report them but this isn't my job to report copyright ed content (which you do have in your database).
A suggestion, and I'm sure this will ensure that you have zero copyrighted content submitted within your image database or atleast copyrighted images at a minimum is by enforcing a rule that only image sets that have been designed by the author can be submitted? and maybe graphics that the author as allowed other people to freely distribute with the member having to link back to the source.
Anyway, I'm quite "positive" this suggestion is very sound and should be discussed and the good thing about this suggestion is that you don't have to wait for 3.8 to come along.