The simple, short answer... NOTHING can be done about it.

If it's on the Web, it's "out there" and as many celebs and others who have been zapped by someone else or misposted something or oher well knows there is nothing to be done about it. Ya don't want it ripped, or otherwise abused... DON'T POST IT, pure and simple. Sorry, but that's the Internet and life on it and with it.

When you see a stolen pic - just use the abuse button below the pic, but do not forget to submit there some evidence that the pic is stolen (url to the original will do the best). I cannot know every pic in the net.

However, you must understand, that if the photo is from a commercial site, there is no any doubt for me that it's stolen, but if the photo is from another site like this, where users submit their photos, I cannot be sure if it's the same person who posting them here or the photos are stolen. "By the book" in this case I need a statement of the person who made and own the photos, not just some third-party claim "I think they are stolen".