Whilst the SCII community is one of the best online communities I have ever been a part of I must say I am still one of the most BM players I know. At first I thought it was funny, but I really am trying to keep composure when playing these days, not only out of respect for the other player but to appreciate that this is indeed a game and getting better involves losing and learning from your mistakes. I think most of the frustration comes from losing because of little mistakes and it is indeed often the greatest hindrance to improvement - above and beyond watching and playing the game.
I guess players should keep this in mind even if they don't care about the community. It's for their own improvement.
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