maybe its just me, but i always get confused reading pitbull and gun threads. i see the same arguments about its the owner being a bad person for not locking these shits up. maybe the US should get rid of guns and pitbulls?
More responsibility and accountability needs to be put on the owner in both cases of ownership. It should take a lot of effort and training to own a reasonable gun (pistol, shotgun, single shot rifles). Same should go with large breed dogs that are strong and potentially dangerous, not just Pitbulls. At this point, all dogs and cats should be fixed, the population is out of control, and not being managed, irresponsible breeders are running amok as well. A neutered male dog is a lot less prone to violence and aggression as well, regardless of the breed.
Pitbulls are also extremely loyal to their owners, even through mistreatment and beatings. So, if you are an awesome owner and your animal is fixed, they will be loving and compassionate. If you are a total dick, they will be aggressive and violent, yet still obedient toward you, because you feed them and "care" for them.
As for interactions with other animals and humans, all dogs should be on leash and controlled in any initial interaction with a new person/animal. You can't ever say that it's great with every dog or person. You have no idea, it's an animal, there may be some strange scent, body language, sound, or whatever that could freak the dog out and make it aggressive.
People are stupid in general, they don't respect a lot of extremely dangerous things in their life, be it an automobile, gun, dog, etc. We need to raise the level of responsibility, accountability and intelligence of owners in general.