Here's the way I look at it, personally: I'm here to play a game and I'm playing the game to enjoy myself. When I am confronted with a situation that could potentially upset my play I have 1 of 2 possible options: 1.) React viscerally with hate and angst and totally ruin my fun over something on a screen or 2.) Remember it's just a game and I should just let it slide off my back so I can move on and continue having fun somewhere else in the game.

I try to avoid the drama as much as I can (probably why I'm not an end-game raider at this point) and do my best not to put myself into situations where I'm going to get overly frustrated. I also never take the attitude when I'm in group content that the run is all about me. Between these two things I tend to stay fairly level through it all and the only thing that ever keeps me from playing is my own decision not to do so.