Give a dog a bad name and you might as well hang it...
All dogs have the capability to inflict serious damage to humans, it's not just a pit bull thing. I guess the danger with these type of dogs is the biting power of their jaws, which is probably comparable to me with a five pound note between my teeth. Plus, along with rotties, and other "tough" breeds, they tend to be owned by "tough" people (twats) who think having a slavering brute straining at its collar is some kind of status symbol, and encourage the dog to be a killer. But with these breeds, there is no doubt that the killer i