As far as I understand, the Dangerous Dogs Act applies only to four breeds. However, I do agree that some people are very silly around dogs and allow their children to put themselves at risk, them it's someone else's fault ie the dog or the dog owner. But that's true of many situations now, unfortunately.
I still think that dog ownership should be better controlled - in a perfect world, dogs would be owned by responsible people but they aren't and some are a nuisance and some positively dangerous to other dogs, other animals and humans. However, if we controlled the ownership of dogs better, we would need to destroy a lot of dogs at least initially and I don't think the supposedly dog loving public would wear that.
The seem to be full of staffies and the like - who's going to rehome them?