This is going to sound very backwards and kind of awful, but I quit being a vegetarian because of PETA. I love animals and I agree that the modern methods of raising them for food are terrifying and disgusting, but PETA was too much for me. I was a vegetarian for a year and a half before joining PETA, but after realizing how exaggerated everything is to the point of lies I felt it was a lost cause. If the only way to achieve anything was by lying to those looking at you for support, then I didn't want anything to do with it.
I don't mean to offend anyone who is a part of PETA, I do love what they stand for. I just can't participate in something that I have to question with each decision that is made.