I disagree with the watermarking thing. It takes away from the piece over-all, and even though it makes the photos easier to steal, what would they do with them? Claim it is theirs? So what?? But in any event, awesome little toys you made there.
Yeah, people do do that. While I agree a large watermark would take away from the image (I think something unobtrusive like a signature or url somewhere will do) I disagree an artist or creator doesn't have the right to be angry when someone plagiarizes them or that it's unreasonable to want to protect their work against that. True that a lot of instances it's harmless or people just repost without crediting, but when people try to build themselves up by claiming someone else's work either for vanity or to make a profit that's still unfair to the creator and should be called out on. Also, if it's something they like viewers might want to know where the picture came from so they can look up more stuff by the artist, I know I do.