Reading a link provided by
@Augustus I found this quote on pit bulls:
Pit bull types
Owners of pit bull-type dogs deal with a strong breed stigma,
44 however controlled studies have not identified this breed group as disproportionately dangerous. The pit bull type is particularly ambiguous as a "breed" encompassing a range of pedigree breeds, informal types and appearances that cannot be reliably identified. Visual determination of dog breed is known to not always be reliable.
45 And witnesses may be predisposed to assume that a vicious dog is of this type.
It should also be considered that the incidence of pit bull-type dogs' involvement in severe and fatal attacks may represent high prevalence in neighborhoods that present high risk to the young children who are the most common victim of severe or fatal attacks. And as owners of stigmatized breeds are more likely to have involvement in criminal and/or violent acts
46—breed correlations may have the owner's behavior as the underlying causal factor.
Breed bans
Most serious dog bite injuries (requiring hospital treatment) in the United States are the victim being a young child
54 and the dog being un-neutered and familiar (belonging to the family, a family friend or neighbor).
32,47,48,54 Therefore responsible ownership and supervision is key to minimizing the risk of dog bites in communities.
While some study authors suggest limiting ownership of specific breeds might reduce injuries (e.g., pit bull type,
49 German Shepherd Dog
50) it has not been demonstrated that introducing a breed-specific ban will reduce the rate or severity of bite injuries occurring in the community.
8,51 Strategies known to result in decreased bite incidents include active enforcement of dog control ordinances,
52 and these may include ordinances relating to breed.
53
It looks to me that the ban on the breed is unwarranted.
Even though to me all dogs are killers. Well, maybe not if I had a maid that could vacuum the room every half an hour or so. Hypoallergenic poodle my Aunt Fanny!!