This.
The biggest problem with pit bulls are the owners. You can ban them, but then Johnny Meth-head or Michael dumbass Vick can always go out and buy one of those other breeds, and then "train" them to be aggressive by harrassing them until they hate all people. Like Nate, I've actually seen a yellow lab that this was done to. It sickens me.
I grew up with bird dogs, but I have owned one pit bull in my life, and the only reason that happened was because I knew someone who couldn't keep him anymore. My friends told me I was crazy to adopt someone's pit bull, and at the time I thought they were probably right, but I decided to give it a chance. Turned out to be one of the best dogs I've ever owned. He loved people, as well as other animals including cats. His name was Ballou, named after the bear in The Jungle Book. I know, I know, Stupid name, but he was an awesome dog.(that's actually a true story)