Wow, anon, you get it.. That's exactly it. They don't know the difference between being playful and being cruel. It's the "don't kick someone when they're down" unspoken rule that sadistic people can't comprehend. They'll just keep kicking and kicking. The thing is though, none of them would have the balls to behave that way IRL. That's why they act out their big-dick fantasies online.