I would agree to that. Unless owners want to be held criminally liable for the actions of their dogs, I mean seriously liable, then they should be banned. That couple in san franciso who had I believe an akita that killed their neighbor is already out of jail. One dead person (chewed to death) and they only served 18 months. To me, that is like discharging a firearm. Another possibility is to have them obtain registration, other than the normal dog tags for the ''sane'' dogs. At least they could be accounted for more easily.
I have a neighbor a few doors down that allows their akita to roam free on their front lawn, while they are out of course, without a leash. They are just asking for an accident to happen. Why risk it.