Sticks and stones can break your bones but words can never hurt you.
Is this your excuse for all your BM? That everyone else needs to toughen up and just take it?
As for what actually constitutes BM... I would agree with Bjornbrandr, BM is bad manners, which includes things like no 'glhf' or 'gg'. It's a sign that you actually respect the other player. Sure, it might suck when you get all-ined and lose, but they still played better than you, it was a game and they were good at it, so why no 'gg'?
As for the holding on for too long, sure, it may be obvious from the winners side that they are massively ahead, but from the losers side it can be harder to tell. They generally don't have enough information to make the call. I know I've extended games 20 minutes longer than I probably should have simply because it was still fairly even. The opponent was winning all the way, but if they slipped up, or I got lucky, I could snag the win. Doesn't happen often, but it's always worth a shot.
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