Some of their shows are pretty good. But I think they can be overbearing and pass over facts simply to yell and throw profanity around to preach about what seems like common sense to them. For instance, they said there was no evidence for explosives in the world trade center. Simply and completely untrue. And the show about the environment was mostly true, but they weren't right on global warming. Although the show was made many years ago. So it might be reasonable to give them some slack considering the time produced. But even so it was pretty irresponsible.

I'm sure there's an episode to even offend Nebraskaboy. They did a lot of them. I really liked their episode on the bible. Their episode on creationism was good too.

Here's their episode on creationism:
Penn and Teller: Bullshit! Creationism

And their episode on the bible:
Penn and Teller: Bullshit! The Bible