I've never had a problem with them.
However, petting and playing with them you find out they're pure hard muscle and play aggressively.
Never had trouble with them but I always felt a vague uneasiness and danger being around them.
I wouldn't own one and I wouldn't let little kids near them.
About three years ago my husband and I took our puppy to a dog park. He was about 6 months old and big for his age. Some lady came in with her full breed pit bull. I bet the dog easily weighed over 100 pounds. He shadowed our puppy and would not allow him to move away without standing over him and dominating him. The idiot owner kept blathering on and on about how sweet her dog was and how pb’s were misunderstood and mis-bred and that the full breed pb was an easy going dog. My husband and I left soon after and never returned to a dog park.
Many dogs can be temperamental and bite sometimes, pit bulls kill you. They will tear all of the skin off your body and start removing limbs in 10 seconds. When they snap, they are killing machines that can’t be stopped. Not fully domesticated as someone mentioned is the best way to describe them. They are like a trained tiger, they can be totally nice but if you do something incorrect, they snap back to wild animal mode. Like Siegfried and Roy’s incident. They had tigers trained like pets for decades and then, snap!