My response to you would be: read the copyright law and how it applies in the USA. Copyright is not too hard to understand, and if you're willing to know what is the real world situation with this, then know your rights. You may or may not find comfort. As said above, copyright is not like patents. You have a copyright on your picture, not on its idea. (If I'm fumbling through legal concepts here, someone please correct me).

I'm no lawyer and Canadian so I can't help you further here, but I do sympathize with your assholeness allergy. Perhaps one simple thing to do would be to call up the guy and tell him he's lame.