People blasting music in a room, with or without headphones. Yeah, I get you like your music, but if it's loud enough for me to hear it across the room, while you hacve earphones on, I hope you develop hearing problems later on in life.

That, but instead of across the room, neighbors. There are walls upon walls separating us. I should not hear your music, or your TV, or the fact that your husband apparently took ten extra minutes getting home and you're insecure. I understand a bit in apartments where there's little insulation but there's a point where it's inconsiderate.

When someone complains about something you do but then do that same thing

Or when someone is rude as hell to you then ask for your help with something they can't do

Or when people post two comments in a row instead of combining them into one. ;-)

I thought about it afterwards

Leaving bread crumbs after making toast or a sammich all over the counter. -.-

This is more personal than anything, but when people hear something poc related and totally victimize the black guy

Poc?

Person of color

Sometimes they are totally a victim other times they're non compliant actions lead to problems