Watermark for your protection

A lot of people know my stand on ruining an beautiful image with a name or logo or URL pasted across the subject. I have spent a large part of my time on deviantART telling people that there are programs out there that will put an invisible watermark into the image and provide just as much protection as one that is visible and ruins your art... 5 minutes with Google and you can find plenty of them, some even free. Why, why, WHY would a skilled photographer produce something amazing, and then destroy it by doing something like this???

It makes me cry sometimes...it really does.