Politics, religion, ignorance, stupidity,(#3 & 4 go hand in hand with #1 & 2 usually), arrogance, pollen chuckers posing as breeders, people being self centered and not aware of it, people being self centered and aware of it, hypocrits, people being judgemental, vegans w/ holier than thou attitudes (you wouldn't be here if humans didn't eat meat in the first place so STFU and eat a cheesburger)...