There is actually one or two county's in my state that have a pit bull ban I found out. And they routinely seize and kill pit bulls. Many shelters will not adopt out pit bull's to people who live in these counties because they will just be seized and killed but the more ban the harder it is to adopt them out and they will just end up euthanized anyway. But the shelters get a lot of them because of "tough guys" who want an unneutered male who they can train as a "guard" dog and it is somewhat of a status symbol in certain inner city cultures to have a dog like this. But "guard" dog means mistreated dog encourage to fear humans. That's saying nothing of the fighting rings.
As a vet tech I used to tell people that the dogs that bite more humans are most smaller Terriers like Jack Russells (little nippy dudes) and dogs like Cocker Spaniels. Problem is little dog little bite. Big dog means emergency room. So here again is the availability heuristic. Little dogs biting your neighbor on the ass is easily forgotten but dramatic bites by large powerful dogs make it seems like large powerful dogs attack more humans. But they do not at all.
But yes I have been bitten by a pit bull. On the hand. I was lucky that the dog was more fearful than aggressive and let go without really doing as much damage as he could I didn't blame the dog. And this was just trying to get him under control long enough to clip his nails and give him a bath!