When I find 1 of my images illegally posted and there's a place to post a comment, I have a comment written up that I copy and paste in their comment section. It basically says that this image is being used by (name of poster) and he or she DOES NOT have my permission to use MY images in any shape form or fashion and is violating the International Copyright Law and is subject to legal actions for each and ever image illegally posted on this site and any other sites. I am requesting the removal of my work and the site admins. will be notified of this violation and will also be liable if image is not removed. And if the poster has the ability to erase comments, I go back and copy and paste the message again and again, meanwhile I send site admin. an email siting such violations. This usually does the job!!! I also provide info to them about having the original paraments, date of rendering & posting on my own personal site. Plus I furnish links to where the original image is posted and a link to where it is illegally posted, so they don't have a difficult time locating the images. Like I said when faced with the proof, they usually comply with my request.