I've come across more sweet Pits (and mixes which more often what people say are "Pit Bulls"), than aggressive but have seen some that were pure neglected demons. Mostly Pit mixes. Most people don't know the difference between a American Pure Bred Pit Bull Terrier, Staffordshire Terrier, Cane Corso, mixes or especially the "bully" breeds. They are all lumped into "Pit Bulls" by those who don't know. In the same manner as the media thinks all handguns are Glocks and all rifles are AR15s.
During my Wife's career as a Animal Control Officer she handled a ton of bite reports and "attacks". A couple times it was covered by the local news. One time the segment came on about an aggressive dog attacking people in an apartment complex and there was a picture of a "Bully dog mix" on screen behind the reporter with "Dog Attack" displayed underneath. Of course it was the most demonizing pic they could probably find. with teeth and studded collar. The actual dog in the attack was far from a "Pit Bull". It was a Blue Heeler (ACD). Another of her cases people were reporting that their chickens were being mauled/killed. Most of them blamed the neighbor who owned a Pit mix. Turned out to be a matted up stray Golden Retriever. It was the only dog she had that broke a catch pole. It was euthanized in short order.
but certainly more than a spray bottle. 
