LOL.. I hope you can find a good way out. Frankly, I want someone to steal my art work some. But it never happens because my art are not worthy enough. So, I'd be proud if I were you.
Watermarking may not, either. And it's a real pain looking past watermarks to see the art, meaning even non-thieves have to look at a cruddy watermark distraction. Though, I even use them, depending on the situation. I just don't like them, I guess.