I hate to inform you, but dogs are not inanimate objects and can fire on their own—that is a problem with a thousand years of genetic development for fighting dogs. Behavior is inbred and people that don’t realize that are either in denial or know nothing about animal behavior.
Of course I am a conscientious dog owner and keep them under control. 19 out of 20 times there's a problem with a dog not just the scary dogs but ANY dog is bad owners who are too damned stupid to be allowed a papillion let alone something larger.
Of course it is easier to blame the dog, it can't argue in it's own defense.
People that understand what the dogs have been bred for also understand the difference between dog aggression and human aggression. For all the years the breed was used in dogfights, it was never bred as a guardian. Human aggressive pit bulls are a horrible representation of the breed, and the vast majority of the stories we have seen so far have been involving dogs that are running loose or chained up, bringing us back to the real cause, which is owner irresponsibility.
Pit bulls are like Muslims. You never know when one will go off on a jihad!