A family that would own a pit bull, are the same types who trowel on eye-shadow and lipstick on an 11-year old. These people are of the stupid variety.
Virtually all the pit bulls (and other dogs) who attack have not been spayed or neutered. And lowlifes rarely bother spaying/neutering their pets, and also favor pit bulls because they look "tough". It's the combination of lowlife humans and lack of spay/neutering that accounts for the colossal number of pit bull attacks. I know a couple of nice people who have nice, well-mannered pit bulls (both adopted from shelters) -- both the dogs are "fixed", and it shows in their behavior. Their owners also keep them leashed at all times when they're outdoors.