The only problem is in the time it takes for you to find them and somehow get them to take them down and disappear to reappear later as someone else they have already sold your picture to three people.
Take a look at my pictures,
http://mattcookreptiles.com/collecti...atinum_003.jpg
Its got a water mark but does not interfere with the photo. You can hardly even tell when kind of ball python it is made of. So I can only hope it stops people from taking them and trying to scam people, and if people just want to show them off somewhere else its got my information with there