What's YOUR pet peeve?

Playing games such as tf2 or dota2 or lol with people who have no idea of the basics. As in people who can't last hit, people who focus the tank, fucking pyros that don't use airblast, things like that. Makes me want to punch a baby.

people who dont clip their nails, people who slam doors! (im old.. STOP SLAMMING THAT DOOR!)

People that say they have swag, people that still say YOLO, people that shove religion down your throat, people that automatically preach to you if you say you're atheist, people whose lives revolve around some "amazing" band and won't shut the fuck up about it, people that hate you if you don't like said "amazing" band, when most people at my school act like immature idiots (seriously. it's not funny at all.), people that think education is useless and therefore use that as an excuse to act like idiots, people that spell the word "you" as "yhue" (I see that on Facebook more than I should), people who write stuff without any punctuation at all, and.... that's about all at the moment. I couldn't choose only ONE pet peeve...

Fiction, fan or original, that lacks logic or common sense in a plot with no in-universe explanation given. Bonus points if: the story falls under the genre of romance and/or drama; the story does not fall under the genre of comedy and/or parody; there are minimal spelling and grammar mistakes; the person isn't trolling; the main character is an author avatar; it gets published; it becomes popular; or it has misused words and it still becomes popular.

If all of these conditions are fulfilled then I facepalm, grab some snacks, and enjoy something worthwhile. Like TVTropes.

(Edit: Fixed the structure a bit. Did not like using so many semi-colons, but it's a list and using a bunch of commas didn't feel right.)

Hipsters

When people confuse "You're" with "Your" and vice versa.

My pet peeve is stupid threads.