See, everyone points to Alice Cooper when talking about Muppet Controversy. The truth is, Alice Cooper might have been provocative in those days, but those were extremely different times. Yes, he talked about "evil" things, and yes he wore make-up, but that is about where it ended.
Furthermore, though his appearance on TMS was controversial, the actual show itself was just a normal TMS episode. It was as if a different star decided to be "evil" and dressed up crazy. That is because, (if you believe Alice Cooper to be the controversial guy everyone makes him out to be,) he had to have toned his performance down. The D are not keen to doing such things.
Ozzy - oh come on. Its not like they worked together when the Prince of Darkness was still tearing up pigeons with Black Sabbath. The Ozzy they worked with is a washed-up reality series star, with little more than excessive cursing as his claim. I mean look at him in the "She Drives Me Crazy" video. Nothing weird about him there.
If The D were to tone themselves down, I'd see no problem. But, like I said, they are not keen to turning off their extreme humor. Thus, I don't see it.
-Matt