I've never busted anything over rage. At worst, I'll say things like "that's a lot of crap" or "what the hell" to myself. And every now and then, if things just go from bad to worse, I'll just quit and try again later. And I notice most of this occurs while playing with other people online and it's simply clear they've been playing longer than I have or just have an incredible reaction time that I don't. For that, I appreciate KillCams. There are times when I really wonder how the hell someone killed me, and watching the KillCam usually does help it make more sense. To you, it make seem like they shot you through a wall, but then you watch the KillCam and see your head was sticking out a bit, or they nailed you just a second before you made it to cover.