If they're really rude sometimes I go talk to them after the game, and say how sorry I am that their life is so terrible that they have to be rude to random people to feel better about themselves
Or just block communication with them so they can't talk to you any more.
But yeah, sometimes I ask people what it's like to have such a pathetic life they need validation from me for winning a game of starcraft... because sometimes I don't GG because I play horribly, and they want to go digging for a reaction.
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