If they have been trained good.
Pitbulls are not vicious or dangerous. Their owns are the real danger. They raise their dogs to be scary and aggressive. Most pitbulls are so loyal they will do anything that their own has them do. I have met an unbelievable amount of them and yet, not one of them was aggressive.
If you say "bad" that's as ignorant and stupid as saying a africans are bad. just because there are some bad ones, doesn't mean they're all bad.
The dog breed itself is good, the humans that train the breed to be deadly are sociopaths and need to be locked up before they harm other beings.
On a side note: Chihuahuas have shown to be more aggressive than pits.
inherent predisposition toward good/kindness but can be abused psychologically and or physically to be aggressive and thus bad
Dogs are like humans, it depends on how they are raised, Pitts tend to have more mussel so they are often trained as fighting dogs, but now all Pitts are mean, I had a Pitt for 8 years before he passed of cancer and he was the sweetest dog ever, he never hurt anyone, my parents had him for 10 years before that