The breed has NOTHING to do with it. These owners will just find another breed, and believe me, that breed will become equally aggressive. Pit Bulls are certainly a special breed, and they require a certain type of person, but they aren't prone to aggression, they are just the unfortunate bystander of poor owners that don't know about how to control their dogs aggression (or raise them not to be), or they choose to reinforce the aggression for their own pleasure.
Every dog owner that has ever brought a new dog home has brought home a "Potentially" dangerous dog. Whether it's a Chihuahua, Labrador Retriever, or Pit Bull. It is always the responsibility of the owner to, not only securely control your dog, but also to go through the proper steps of training/raising, to ensure that you won't have these issues. And if these issues arise, it is the responsibility of the owners to work around them, provide the dog with a life that can still be rewarding, and make certain that the no one will ever be at the mercy of it's aggression.
And you hear about snake attacks more than attacks by deer, it's just the nature of the beast. I go by what I see, and every Pit Bull that I've ever seen has been wonderful. It's 100% due to proper training/raising.
It's a very bad misconception that Pit Bulls are pre-disposed to aggression. They have certain traits that are unique to them, and their strong willed nature can lead to signs of aggression, but all is manageable with responsible owners.