I have a problem with censoring this sort of thing. I am a member of a folklore mailing list where a number of scholars are currently harvesting these kinds of jokes from the Internet.Difficult as this type of humor is for most of us to suffer, it does serve a purpose--it is one of the oldest, most common forms of stress release in the face of the truly awful and incomprehensible.
I'm not suggesting anyone like it, or even accept it. But I've got a real problem with any attempts to censor it.