A good read, and some very good comments made
I agree with the fact that any dog, no matter what breed, if not trained properly, can cause serious injury to small children. Yes a staffie is going to cause more injury quicker due to their build, but any dog attacking a child is going to cause damage.
The whole animal licensing seems to be completly out of control, a staffie is up there on the list as in general it is young lads who get them as it makes them look "hard" and will not train them to NOT attack people / other dogs.
Different animal completely but the licensing on big snakes has recently come into effect in America and a few other places which is preventing people from keeping the bigger snakes without a very expensive license, on the notion that they are "dangerous". I honestly cant think of a single news story about someone being injured, never mind killed, by any of the large snakes now on this list. I know in America some people had let them free in the everglades and they had started breeding but that was effecting the wildlife around the area, not killing people, yet with a similar kind of license you can legally keep cobras / rattle snakes and a number of other, very venemous animals.
All in all, ANY animal that is not trained and/or looked after properly can be a threat if it is deemed in anyway dangerous. A large domestic cat could cause a lot of damage to a baby, as could a small dog, you can legally keep some rather venemous spiders with no license what so ever, which again to a baby, could be fatal.
If you buy an animal, it is your responsibilty for everything it does, if one of my spiders were to escape and bit someone, thats my fault, not the spiders, in the same way if a dog attacks someone, it is the owners fault for not having it trained / not having it on a lead