I've gotten compliments, and given them to, but sometimes the game can be kinda fast paced and you don't have time to type out a message. Sometimes when I join a game I go "Hi All" and I always get a response.
As for the GG thing, I've tried, but the game starts switching to the next map so fast that it doesn't always make it before the switch. I think if there was a few more seconds people would do that more, I've played Caslte Wolfenstein and they do it a lot there because there is that extra time to do it in that game.
I think silence is ok in a game anyway, it's when some good starts overusing the ingame chats or starts with the "I'm gunna own you guys" crap that things start to go downhill.
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