These threads always make me laugh, lots of people with opinions who have little to no experience of dogs, especially dangerous breeds.
I have always been around dogs since the age of 2, over a year ago I saw an episode of 'The Dog Whisperer' on sky. Since then I have read everything possible about dog behaviour, training and psychology. I volunteer at a couple of local dog rescue centers and work with many breeds of dogs that can be considered dangerous, and several dogs that are dangerous.
All animals have the ability to be dangerous, no matter the type or size of the animal. To say that dogs can't be dangerous is a lie, to say that certain breeds of dogs aren't more prone to being dangerous is also a lie. However, that doesn't mean that all dogs of that breed are potential killers.
I work with a lot of pit bulls in the rescue centres, on the whole they are lovely dogs. One or two have had some psychological issues that made them potentially dangerous dogs but we moved past that and now they are friendly & socialable dogs. The only dog I have ever been bitten by was a jack Russell, a little guy with a serious complex, it is going to take some time to sort him hopefully.
How dangerous an individual dog is comes from the person who cares for it. Some dogs have underlying tendancies for violence that can be nutured by those so inclined, hence the reason that pitbulls, rotty's, Dobermanns etc are considered more dangerous, its because the wrong sort of people are allowed to own these dogs. The Rottweiler for instance is actually a herding dog, its only man that turned him into a guard dog.
We need to bring back dog licensing for a start, have strict rules and regulations about who can own what dogs.
Until real investigations are undertaken no one can state what laws are needed regarding dog ownership. One problem we have is that the media love a dangerous breed attack story.