We haven't been there in years and are headed back in May and I'm disappointed to hear this is still a problem.
I remember standing in line at the pirates ride in Disney Quest and my son, who was only 6 at the time, was so excited about everything going on around him he kept getting out of line to watch people on the raft ride which is right next the pirate line up. After calling him back to line up for the second time, I explained to him if he got out of line again we would have to go to the back of the line. That's when the woman in front of me turned around and starting yelling at me that my son can do what he wants and that he doesn't have to stay in line if he doesn't want to. I was shocked! It's not like I was yelling at him, talking down to him, or even angry with him. I was just explaining to him how the queue works. The two men she was with kept facing forward in the line & pretended like they didn't know her so I'm thinking she has a habit of telling off people she doesn't know. Got to love Disney though, the cast member working the line walked up to me and said, "Congratulations, you just won Be a Pirate for a Day for a Year of a Million Dreams and you get to go to the front of line." I know that was no coincidence, that was the cast member's way of defusing the awkward situation.
Another time we were on the Animal Kingdom bus and a woman who was chaperoning a cheerleading group spent the whole ride yelling at the bus driver because she wouldn't drop them off at AKL before we went to the park. The bus driver was trying to explain to her that the park was opening in 5 minutes so she needed to go straight to the park but her group could transfer there on a AKL bus once we're there. This woman was not happy about not getting her own way and starting throwing a tantrum, yelling over and over again, "This isn't very magical!". By the end of the ride she was threatening to fight the bus driver. I wish I could've stood up for the driver but I was there alone with my son so I couldn't risk her attacking us. I have to give the bus driver credit though, she kept calm & professional the whole time. When the bus arrived at AK the driver jumped off the bus quickly, I'm sure to signal another driver or cast member and the woman laughed and said, "She's scared of me". What an awful role model for those cheerleaders she was chaperoning and terrifying for the other children who on the bus.
My theory is that Disney has such great customer service that some of their guest are now spoiled. Those little spontaneous things that Disney does to give guest a magical experience are now expected every time by some guest. What those guest don't understand, that if Disney created those magical moments for every person, every time then they wouldn't be so magical...it would just be a common occurrence. I'm sure the appreciative guests outweigh the bad ones but you know the saying, it only takes one bad apple to spoil the bunch....