When I looked at my site stats it was astounding how many different MYSpace pages had taken an image, it was hundreds. Its a compliement that these people like my site and I'm sure the vast majority don't realise they are doing anything wrong by hotlinking.
Before doing the server changes I did have a little fun with some of the images. On one MYspace account it had one of my large Michael Jackson pic below "Who I would like to Meet", so I searched google images for "ugly man" and then replaced that with the MJ file. A nice big picture, and wow he sure was ugly, I felt sorry for the guy, someone who actually has to live his life living looking like that.