This video was uploaded by user PleatedJeans less than two days ago, and it's showing promise of achieving viral status, with 20,000 viewers checking it out so far.
Meant as a social satire, this elaborate description of what makes someone inconsiderate might make you rethink some of your habits.
Sharing a flat with other people always makes room for passive aggressiveness, but, if you want to turn that into actual anger and really annoy someone, don't wash your dishes, replace toilet paper after you've finished a roll, and always leave the house without turning the lights off.
If you really want to be bad, you can talk during a movie, not call your friends when you're running late for meeting them, or refuse to use garbage bins and just throw waste on the street.