Kris, I dont really know you but from posts on all the sites I can tell you are a truly down to earth nice guy thats doing something amazing. You seem like a really nice guy. But your artwork is allllll over the net being posed as everything from GM Designers new Camaros, to some kids art who messed with yours a little.
I know you probably mean well, but you are running a business, no matter how small...and you have rights associated with it, legal and other. I think its good you are researching your options, and I would hope you would take some action is applicable to this case.
I am sure there are bigg things ahead of you with your talent, so protect it as best you can now.
Tim