Penn & Teller's Bullshit! on Showtime is one of the most lucid shows out there. Unfortunately, it's on Showtime, which I don't get (thank you, Internet). Today, I found a link to the episode on PETA, the People for the *cough*Ethical*cough* Treatment of Animals.
It's good enough that I'm posting the video here (right-click, save as).
I was never a fan of PETA, but after this, I feel sick. Watch. Learn.
UPDATE: Video is now gone; someone slammed my server.