I'm sorry you had those experiences. We were there for 2 weeks over Thanksgiving, and we didn't have that happen to us once. No one ever got in front of us during a parade or show, we never got run over (and didn't run anyone over wit our stroller, either, but it was close a few times! Thank goodness we have a really top notch stroller, because people just stop or step right in front of the wheels all the time). We didn't see anyone yelling or fighting or anything. We had a really good time.
I have noticed that the crowds respect my dh way more than me, though. If I'm without him and sitting at a parade route or walking through the crowds, people try to take advantage of me. But when dh walks through a crowd its like the parting of the red sea. I don't get it. He's 6'2" and about 200 lbs, and very fit and looks very much like an athlete, which he is. But he's also super clean cut and the kind of guy that small kids approach to chat with. He looks really harmless. But no one ever messes with him. Me, I'm 5'5" and 145, and people try to run me over. I dunno. It's been kind of a running joke in the family, so when we're in a crowded place, we tend to stick together, and never have a problem with crowds.
Except one time at
Disneyland, we were front row waiting for the play parade at DCA, and an Asian woman told her kids, in accented English, to go sit in my kids' laps to watch the parade! A CM saw them, and came over and told them they had to move and she pretended she couldn't speak English. The CM made the kids move, and we had a laugh about it, so it wasn't a big deal. It's still one of my favorite crazy stranger experiences!
We had another odd experience at Ariel's Grotto. We have been a few times, and every time we go there is this young guy who is alone eating there. He always gets pictures and autographs with Ariel, and literally follows her around. She's always been very gracious about it, but you can tell from her interactions that he is there nearly every day. Creepy.