@Growingupinthe80s
It's not a misconception though these dogs were not ever bred to attack humans, wouldn't have been very good sport for them to start ripping the audience apart.
For example a police dog is genetically disposed and trained to bite the person running away under a certain set of conditions with a certain procedure. they don't just start chomping on kids in the park.
The problem with any such thing is that bad breeding/ lack of correct diet/ incorrect handling/ lack of care. can result in problems occurring.
Unscrupulous breeders bred any old bitch to any old dog to get "fashionable colours" or "big rope" bulldog. That met with irresponsible owners means this bullshit occurs.
Next month everyone putting there XL bully down for £200 at the vets will just go buy a Cane Corso or "insert any large breed dog" so then what will happen is the same shitty breeders will just go do the same thing to them.
Meanwhile Sue down the road who has dutifully muzzle trained her really friendly mix breed she got from dogs trust three years ago and is worried how she will afford third party insurance has never been and will never be the problem.
But for some reason people on mumsnet seem to be a place of people who really hate dogs.
I'm not suggesting it's okay to have an out of control aggressive dog but charge people for doing so, with massive fines/ and or prison sentences. Don't just make life really difficult for the law abiders while the people who do not give a shit will continue to abuse animals.