Trust me, I work with enough pit bulls to know we've got our own share of dangerous dogs. I used to believe it was never a pit bull, ever!
Then I got bitten, then I had too many clients who can't go in public without their pit bulls trying to kill other dogs, then I realized we aren't the angels I wish we were as a breed.
Work in a shelter or a training facility long enough and you'll start to realize, sure many are mislabeled (just like manu good stories) but ut oh, maybe some of those pit bulls in the paper actually are pit bulls?
I don't think this is the only case but a lot of pit bull people seem to dig their heads in the sand and sing la la la not my breed, no way! Instead of saying, well, we screwed up somewhere, how do we fix this?