Good for you! If people are going to own an aggressive dog then they should be held accountable when their mutt attacks someone. A few years ago a little girl sitting at a lemonade stand was nearly mauled to death by a dog in my neighborhood. The owner was walking the dog without a leash, it was a black lab, a breed that rarely pulls that kind of BS. Most of the time a dog's behavior is molded by the owner. Especially pit bulls, they're a product of their environment, either super aggressive or completely harmless. They are not the unpredictably violent creatures that a lot of people believe.