-People chewing with their mouth open
-Bad grammar
-People exiting through the emergency exit door in the subway
-People exiting through the front door of the bus when other people need to get on
-People trying to get on a bus that's already full
-People who, for some reason, have to walk in a straight path continuously, and if one is in their way, they will not go around them, and instead, will shove them out of the way
-Littering
-Bad drivers (I don't drive, but people who can't follow fundamental traffic laws is just upsetting)
-"...where it's at." or any variant thereof
-People who won't read (e.g. "Hey, where does this bus go?" and the destination is displayed in huge [tornado fang]ing letters on the front of the bus.)
-People who repeat statements more than one consecutively/in succession
-People in class who say "What's the point of learning this? We're never gonna use this in our lives" or any variant thereof.
EDIT:
-People who think one's ethnicity/race should be a factor in anything other than racism
-People who abuse the phrases "kiddy [parasitic bomb]," "young adult," "mature," etc.
-People who barge into threads about things they don't like and post such bullshit as "WHY DO YOU PEOPLE PLAY THIS HURP DERP DURR"