I agree with a lot of the work that PETA does. Animal cruelty, clearly, is an issue that deserves a great deal of attention and requires a lot of reform to prevent, and PETA does that.
However. I will never support PETA in what they do. As much as I might agree with it.
They have a nasty little habit of objectifying and degrading women, destroying what dignity we may have, in order to make a point about the dignity of animals. Yes, animals have dignity. Yes, the meat industry (etc) is disgusting and destroys that dignity. But you don't call attention to that fact by becoming the meat industry, by treating women like the meat in that industry.
Their most recent example of this is a video, released around the time of the State of the Union this year. It's PETA's very own state of the union. With naked chicks.
Including the vomit-inducing quote about doing animal rights work: "Often this means taking our clothes off." Oh, and the lovely, "hot chicks are an American tradition!" Disgusting.
The offensive video:
(A few) earlier examples of PETA's misogyny:
naked chick at a chalkboard
naked chick marked up like meat
naked chick with some actual chicks
And, of course, their "Milk Gone Wild" campaign, which makes me throw up a little in my mouth.
[ETA: Jill at Feministe found more of the offensive ads. Ew.]