[quote SofiaMichelle]@sunflowersandbuttercups that's true, but your average person would have a much easier time fighting off a miniature poodle than a council bull terrier, of whichever variety.[/quote]
A fit an able adult would, yes, but not a newborn baby or small child who was unattended, or an elderly person who was potentially knocked to the floor.
The point is, dogs of all breeds and sizes have the ability to do damage - see the links upthread - newborns have been killed in their cots by tiny 7kg Jack Russells, and children have had over 200 stitches put in their faces by the family Labrador.
Yet you never, ever see calls to ban either breed. But a Labrador is a big, strong dog that weighs 30kg on average, which is double the weight of your average pedigree staffie.
Ultimately, banning a breed doesn't solve anything. In the nineties, they banned pit-bulls, so people got dobermans and Rottweilers instead. Then the trend changed to huskies and malamutes, then Akitas, now it's veering towards breeds like Belgian Malinois and Caucasian Ovcharkas.
Any breed has the capacity to severely hurt someone. Training and proper breeding regulations are what's needed, not a sledgehammer ban that, as we know, doesn't actually change anything long-term.