Why people think that their dog will bite them.
I get it, to some degree. They see their dog bark and lunge and get in an attack stance all the time and they never bite. But WE don't know that. So when their dog LOOKS like they may do something, we don't have any clue that they won't.
Christmas a few years ago we went sledding. There was this dog that was barking at everyone. It would legit loom like it was going to attack if you did anything wrong. These idiot owners couldn't figure out that it was making kids scared and was just down right annoying. I tried to ask them nicely to please move their dog and you'd think I'd shot their kid. Got all pissed. Almost was a fight.
TL; DR: dogs suck (and don't give me the 'its the owners, not the dog." Both suck)