In the past I have had three separate people ask to use images I have posted. In each case I granted that request but asked to see the work when finished. This was out of curiosity as well as a way of tuning into what kind of work that artist did (although one, MichelleA I already knew, and, like many, have favorited!). Although I don't think we need to be judgmental, I feel that if my work was being used as a springboard for something objectionable (violence, porn &c)I can't just be a distant 'patsy' in the process. There is such a thing as 'a transferance of spirit' in art, that is one reason copyright laws exist. With the shoe on the other foot, I recently deleted 3 of my mixed media / collage images because they used Renderosity 'unapproved' stock (google search), albeit in small parts. The key to copyright was spelled out in the Mixed Medium copyright notice and I was unaware of its very broad scope. I am now vetting dozens of collages I have done that are 'unlawful'.. which is painful!!! They work beautifully in a graphic context (some use old photographs with that misty sepia tone look), but because of source they are illegal. I will probably use parts for drawings/paintings in large size (inspirational!!! but illegal to transmit!). Stick to the law, it makes you a better artist. I hope this post was helpful...