People who talk during Fantasmic!, IllumiNations, and every stage show on property because they think that since they don't speak English, they can have their own conversations at other guests' expense. Then there are the people who clap and sing...in their groups of 50...
Guests who question height restrictions.
I second guests smoking in areas not designated as smoking areas.
Guests who walk in front of me and then stop.
Guests who don't look where they are walking.
Parents who don't have enought class to take their screaming kids OUT of the Tree of Life Theatre when the screaming starts--rather, they attempt, in vain, to calm them down.
Guests who talk during preshows, blocking out all audio.
Guests who leave their trash at their tables at the counter service restaurants.
Guests who get to the Fastpass Return too early, and block the entrance until their time comes around, disallowing guests with current Fastpasses from entering.
Guests who complain that Disney is too expensive (don't you come to Disney expecting prices to be twice as much as anywhere else?)
Guests who wear Universal or Sea World Ponchos in the sea of yellow.
LINE CUTTERS ("I'm meeting my family up here")