My dog was traumatized by a pitbull when he was a puppy and never really wanted to socialize with dogs again after that, meaning we have a very very very wimpy dog. Now he really only likes hanging out with people. He was attacked a few times by pitbulls in riverdale farm since then, and now he basically shys away from any other dog (he is okay around some labs and larger dogs though).
I always thought it was weird that people bought a dog they knew they would have to muzzle... Any dog can flip out and go crazy, but I can overpower my lab's jaws, but theres no way in hell you could get a pit bull off of your leg/arm/face. They're pretty damn ugly looking too.