Unforgivably Disrespectful Things Done By Houseguests

Almost everyone understands that you should be respectful in someone else's home, or at least that you shouldn't drink all their good beer and clog all of their toilets. There are however an uninvited few houseguests who do rude and annoying things. People have a hard time forgetting slights like this, which lead to some petty injustices that people stay salty about.