An entire breed of dogs shouldn't be banned because some members of the breed have bitten people. Most of the time, it's the humans who are at fault, anyway. I've met large dogs that are quite sweet and lovable and I've met some that are just plain nasty. The difference? The owners.
Just up the road from me a guy has a couple dangerous dogs--a boxer and a shepherd mix. They almost killed me neighbor's dogs and they killed several rabbits which belonged to another neighbor, went after our rabbits, and went after my neighbor. What does their owner do? He's let the dogs run around the block off the leash. Once a few years back my dad was driving with me and my sister and their owner actually flagged us down, the dog's leash in hand, and asked my dad to slow down because his dog was walking on the side of the road and didn't always come when called. His gate gets left open so the dogs can get out and attack other animals and people. Just a week or so ago, thank goodness school wasn't in session because these two dogs managed to get all the way to the local high school.
But it isn't because they're a boxer or a shepherd mix. My aunt's friend has an absolutely adorable boxer. It's because the guy who owns them is a moron and obviously can't handle his dogs. It's a known fact that they're aggressive and nasty, so he should be making a point of keeping his gate closed and the dogs contained and under control. If he did that, they wouldn't get the chance to attack anyone. Or if they'd been trained and socialized as puppies maybe there wouldn't even be a need.
I don't see the point in punishing responsible owners just because there are jerks like this guy around. Same goes for pit bulls. I haven't met many, but I'm sure it's the same thing where dogs with responsible owners are safe and it's just the idiots that give them a bad reputation.