Everyone has made some excellent points. I would just like to add one thing, and it has to do with the group's money issues. PETA has a website, and I implore you not to visit it. They justify the site's existence based on the number of daily hits, and by clicking over to it, no matter how morbid your curiousity may be, you are helping the organization to spread it's skewed views. Suffice it to say that this group depends on people who are followers, not leaders, who cannot and will not think for themselves.
I realize that by discussing their website some may want to visit it to see what I'm talking about, but I think that it's worth the risk. I'd rather have people know about the consequences of curiousity first. As a rule, I don't usually discuss PETA, because I simply don't want to acknowledge them. But as Juro has described, they have double and triple standards that can set the table for dangerous precedents.