alistair The root of the problem is irresponsible people and I think that’s the only way to deal with it. If you start banning breeds, where do you draw the line? Size doesn’t work, as your average Irish wolfhound as an example, is as gentle as a dog is going to be, while dachshunds and border collies bite like crazy. If you start banning breeds, define the line for me. I have a Doberman and she’s a softer dog than any of the schnauzers I’ve had.
Practically speaking, it’s very difficult to do. Part of the issue is separating the frequency of bites vs. the outcomes. No one cares if a 4 lb chihuahua clips their ankles all day long, but if a mastiff does that, you lose part of your leg. Same behaviour, different outcomes.
That’s why I’m in favour of “certifying” owners in some way, with regular check ins to make sure their maintaining a behavioural standard. The problem is that is expensive (although if it’s passed straight to the owner and the rules are actually enforced, maybe that’s a good deterrent) and, in my experience, there are a dozen awful and unqualified trainers for every decent one.