I really can't stand...

those who consider themselves smart when they occupy two places in a parking with only one car;
those who, while regularly taking the bus without ticket, have the nerve to get angry if they are fined;
those who, while appreciating everyone who admits to be wrong, consider themselves exempted from this behaviour;
those who, once they know that I study Astonomy, ask me for their horoscope;
those who fart in narrow public places like lifts and phone boxes;
those who mistake libraries for bookshops (i.e. they never bring back the books they take);
those who mistake bookshops for libraries (i.e. they sit reading for hours without buying anything).