I won't support any breed-specific legislation or ordinances. In assessing the potential violence of any particular dog, the behavior of the dog's owner is far more of a factor than any presumed genetic tendencies. (I've had Rottweilers in my office, fercryingoutloud; they weren't any kind of threat at all - but they'd been properly trained. You give a dog, even a small spaniel, to a sociopath, and sooner or later that dog is going to be a menace to someone.)