http://www.dogbitelaw.com/Dog%20...%20Clifton.pdf
"Temperament is not the issue, nor is it even relevant. What is
relevant is actuarial risk. If almost any other dog has a bad moment,
someone may get bitten, but will not be maimed for life or killed, and the
actuarial risk is accordingly reasonable. If a pit bull terrier or a
Rottweiler has a bad moment, often someone is maimed or killed--and that
has now created off-the-chart actuarial risk, for which the dogs as well as
their victims are paying the price.
Pit bulls and Rottweilers are accordingly dogs who not only must be
handled with special precautions, but also must be regulated with special
requirements appropriate to the risk they may pose to the public and other
animals, if they are to be kept at all."