I suppose the type of person who normally does this kind of thing isn't exactly Einstein to begin with. Moronic criminals outing themselves online is nothing new. I remember a few years ago, a bunch of kids filmed themselves graffiti-ing (is that even a word?) the side of a train, while trespassing in the train depot, no less, and uploaded it to Youtube. As I recall, they were actually surprised when they were arrested a few days later.
It'd be really nice if their stupidity could get them killed or at least maimed or otherwise physically incapable before they do something like set a dog on fire, but at least it's something.