I've witnessed plenty of rude behavior, but I can only recall being a target once. Back in the FP runner days, I was "excusing" myself past a slow-moving group of people while I tried to catch up to my party. A little girl stepped into my path right as I was passing by them, so I bumped into her. Her mom yelled at me and said, "YOU COULD HAVE SAID EXCUSE ME." And I said, "I did, but I don't think she heard me." The mom then turned to her daughter and started SCREAMING at her to pay attention, stay out of people's ways, etc. I felt so bad for her. I mean, it's a crowded place, people are going to run into each other, especially in narrow places (this was in Frontierland back by Splash and BMTRR, where it's always so congested).