PETA isn't evil. Yea, there are crazy extremists in PETA, but the values and goals of the organization are not evil. I'm a member and I see nothing evil about wanting to stop animal abuse in the world. How can we tolerate a world where animals are abused? They're slaughtered horrifically, used as useless test specimens, skinned alive for their furs, and so many other evils are done to animals! How is PETA evil when it stands for eliminating the horrifying evils of animal abuse?
Extremism can be taken to far in any organization. Whether it be religions, animal rights like PETA..anything.
I think it's interesting that Team Plasma is this type of bad guy. It's entirely different from the rest of the other evil teams.