A former fan of theirs picked them apart if in this insightful review of Bullsh@t:
(to expose some of the techniques that Penn and Teller use, and I started looking for them in other episodes, even those episodes with which I wholeheartedly agreed (in other words, all of them).
found something pretty standard in all their arguments.
For their opponent, they usually find the absolute most extreme camp they can find, a camp that probably represents 10% of the other side of the argument, and they use that as the face of the enemy.
example, in their episode on eating and feeding the world, whom did they choose as the antagonist? Greenpeace and a group of hippie-freakshows who only eat raw foods.
Of course we're going to disagree with these idiots, therefore agreeing with Penn and Teller. We leave the show thinking that any and all genetically-altered foods should be dumped into the 3rd World, bar none.
What they don't show you are the extremely intelligent, forward thinking scientists who recognize the *legitimate* problems with this. Most notably, while genetic engineering may have saved a billion lives it has also done something else very obvious - drastically increased the population.
Therefore, deaths related to overpopulation not associated with starvation - like aids, leprosy, and other illnesses - have drastically increased, inverse to the decrease in deaths from starvation, even exceeding it in some areas. So in trying to do good, we could, in the end, be killing more people.
I'm not saying I totally agree with this point of view, just that it is a legitimate facet of the argument that isn't so easily dismissed with a wave of the hand like the ignorance of the losers that Penn and Teller put on camera.
So be aware as you watch, that there are almost always more viable arguments against their points that they are not showing you
Guess what? Penn and Teller do an entertainment show based on their opinions, just like Limbaugh, and the Air America folks. And if you don't agree, you can listen to something else, or watch something else!
But I realize it, I know that the show is biased and is the opinion of the hosts, yet, I can watch it and realize that for myself. But the important thing is that I CAN watch it, I don't have to worry about a bunch of zealots that got their feelings hurt who want to ban it.
I watch shows, and I decide what is true and what is BS, its pretty cool that I can do that, doncha think?