Someone put up a nearly complete list of P&T B! episodes on Google Video here:
And I found one ep on the list that I hadn't seen before: "Profanity"
This has just got to be my favorite episode of Penn & Teller's "Bullshit!" ever. It opens up with Penn telling us that Houdini dedicated the last few years of his life to debunking "Humbug." Now, "humbug" was a rude word back then. In fact "humbug" was considered so profane in Hoidini's time that the modern day equivalent would be - you guessed it - "bullshit!"
The episode gets a lot more fun from there, including a shockingly hilarious demonstration on a poor, innocent chihuahua of how context is much more important than language, and some jaw-droppingly ignorant people who are willing to claim on-camera that the First Amendment does NOT protect an individual's right to use profanity, or other speech that may shock or offend.
I'm all for people deciding what they want and how people are allowed to act in private spaces they own. In fact, I see that as a pre-condition for real freedom. But, I also have the same freedom. I also get to decide what I consider acceptable, or not, for me. And, as it were, to "change the channel" when something offends my values.