I'll start:
1. People who throw perfectly fine food away
Your turn!
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Majorly-depressed individuals. Homosexuals who match their stereotypes. (Fruity) Ghetto people or ghetto wannabes. Rednecks. Pushy atheists and pushy religious people. Individuals who talk mostly about sports. Idiots who say they hate Halo for dumb reasons such as saying that it's unrealistic.