I think, as I alluded to before, it's a status thing. A strange kind of status, in my opinion, and it's hard to verbalize what I mean.
It's "this dog is controversial. This dog is disallowed. This dog has a bad rap. So, I don't want any other kind of dog, EVAH. I iz an individual. See, I got this tattoo to prove it."
I do believe there are loving pits that wouldn't hurt anyone...but as SG said, irresponsible people cause the problem, and it's a shame...but it isn't a risk I would be willing to take.
My mind keeps going back to The Life of Pi, where Pi was talking about growing up in the zoo, and his dad's lectures about never forgetting that animals are animals. God knows I love animals, I've always had a sensitivity towards them. This penchant for the critters does not preclude me knowing that there are things about animals we can't know or understand, and therefore can't predict...nor does it preclude me from eating a couple of 'em.
