This wasn't at Disney, but Disney related. When I did my college program at WDW, the girl I shared a room with was a little on the strange side. She asked to borrow money the first day I met her, and I woke up in the middle of the night, and she was standing over my bed starring at me! She was just dirty! She had a bloody nose all the time, which I understand, but what I didn't understand the need for her to leave her bloody tissues on the floor of our room. Once, I got home and their was a bloody tissue on my bed! Oh, I gave her a piece of my mind after that one! The next week she left early, and I wasn't too sad about it.
This is another gross thing, but wasn't at Disney. When I was in high school, my mom, and I were at the grocery store, and stopped at the deli counter to get lunch meat. As the lady was getting our lunch meat ready, she took of her glove, sneezed in her hand, and then picked up our lunch meat with her bare snot hand! I started gagging! My mom took the meat, and we took it directly to a manager! Never again did we get lunch meat at that store!
I just wanted to add.. People do not brush your hair at the table!! That is gross! Hair flies everywhere!! I don't know how many times I have been at Disney when someone whips out their brush.