My response is no - unless these dogs have been genetically bred to be aggressive. If the dog has been de-domesticated to behave more like a wolf, for example, then yeah I think it should be banned. We don't just let people have wolves, do we? We don't allow tigers on the streets, or lions... so a big dog that has been bred to be vicious (genetically), is going to be a problem. But my intuition tells me it's more that some people get these dogs to train them for aggression or fighting. In this case, I don't think it's the dog's fault. A chihuahua may well be even more aggressive, but nobody is getting killed by chihuahuas... I hope.

Btw have you guys heard about the lady who was killed by a pack of weiner dogs? What a way to go.