Hey now, it's not the pit bull's fault it had a bad owner. Pit bulls are incredibly intelligent dogs, and need to be trained really well. Some owners either don't understand this, and thus the dog doesn't learn to repect people and you get attacks, etc, or you get owners that do understand this, and train them to be attack dogs.
My dad's owned several pit bulls, and they were all absolutely great dogs. The one we had when I was a baby thought I was his puppy, and would watch over me and get upset if I started crying (often because he hit me with his tail...). If you are assertive in training them, or better, attend a training course as a puppy, and socialize the dog early and often with other dogs and people, they can be great additions to the family.
Don't write off a whole breed because of idiotic owners.
Sorry, rant over now...
You could represent a pit bull the next time some 4 year old girl gets her arm eaten off for petting one.