Topics like this become so heated. Everyone has their own opinions and that's fine.
I worked as a bather in a grooming salon. The dogs three dogs who bit me were a Golden Retriever, Chihuahua, and a Yorkie. The dogs who were the biggest babies, boxers and pitbulls.
Yes, little dogs can get away with a lot more because their small mouths don't do much damage. Thus, they don't hurt someone so bad they end up in the hospital and the incident doesn't end up on the news. It's still a bite, whether it's from a small dog or a big dog.
Some of the incidents that show up on the news and they say it's a pitbull, sometimes isn't. They are mixes or something totally different.
And there are many incidents of people getting bitten by dogs, most of the time it never makes the news unless it's a pit.
There's no such thing as a bad breed, again it's how they were trained and in some instances bad breeding (breeding two dogs with bad temperaments or inbreeding).
Which Dog Breeds are the Most Aggressive?
Again, the breed will continue to get a bad rep as long as there are owners who don't care to train them. It's horrible and I hope one day it changes. Until then many will live in fear... heck I would be scared if a dog came charging at me because the owners are not responsible enough to secure them.