Pet Peeves in MMO's

Allright, like the title states let's discuss some of our pet peeves in mmo's. I'll start it off simply... One of my main pet peeves in mmo's is when I'm trying to farm materials for something and other people show up refusing to cooperate. My biggest pet peeve though? Is when you're in a raid or something and someone pulls a leeroy jenkins near the end, or worse ninja looters...though those two things are usually done by the same person >.>

Mob droppers AFK Farmers Bots Cocky GMs Stupid Players

I think my biggest pet peeve falls under the "stupid players" category xD, though it's more stupid for the intention of being stupid to ruin peoples lives.

Lag! Just kidding~ Hmm..Overly strict guilds maybe? ;3;

Pro players, they have huge egos yet whine when they get owned by newbs. And yes Lag. Gold Bots as well however if it's open world PvP then its not too bad an issue. I just kill them then.

Pro players. Just because you've played for a longer time than someone else doesn't mean you should brag about it, or disturb other players.

Kill stealing. Sometime people are actually helping you but sometime they really go out of their way to take away as much loot/exp/points as they can. It gets ridiculous when a lvl 50 something follows you around to one-shot lvl 10 monsters and getting half of your much desired experience points, or when your "ally" team-kills you for it.

video lag... I hate my graphics card. Also elitists. I'm playing for fun, not to max everything out and be all perfect like.