I have friends on FB and also online rescue sites, and, I'm not kidding, the majority of the dogs needing fostering or rescuing are Pit Bull mixes or pure Pit Bulls. Why so many of them? I have a friend who has two preschool children and she rescued a pit bull from a trash dump. They swear it's the sweetest dog.
I wouldn't own one because I doubt my own skill in training such a dog.