The bathrooms, the kids use it properly, but when there's toilet paper, they always throw it into the loving toilet to doom others.
people stealing your seat after getting up for a literal 5 seconds
people using their bags to take up lunch spots
when teacher wakes someone up, even when the student just wants 2 minutes of sleep.
people saying that games I like are gay
People not taking a loving joke
people trying to make shots in class after scraping something.
cooties
very short fights that make everyone go insane
Paybacks (return in money) that never happen
When people think they're smart and attempt to skip or as they call it, backskip to get to the front of the line faster.
That's about it really