I'm probably one of the least experienced players in the game and, I'd have to say, I've never gotten kicked. I've seen a tank have to leave because he refused to slow down on his pulls (The WHM could not keep up with the dmg he was taking--plus he wasn't even trying to avoid AoEs), but I've never kicked anyone or been kicked. I'm sure I'll get mine some day, but it hasn't happened yet lol then again, I tend to run with friends from my FC, so maybe that's factoring in.