I understand copyright issues, but honesty on a site like this, I find it extremely annoying to have someone's name right smack across the center of a photo. I'd rather you just don't post it if your that worried about somone downloading it. Using low res is a good solution because if someone's taking it, they really can't use it for anything useful besides reposting on the internet. It will look awful if they try to print it, enlarge it, etc.

It's a different matter in the case of professionals, whose work really is copyrighted.