I've been given negative feedback for trash talking, and never even bought a mic at that point. It's funny when I think about it.
And yes it is also funny hearing sore losers more concerned about their K/D ratio than, god forbid, enjoying the game. But for all the players you try to avoid, it makes you appreciate the kind hearted players much more. Recently, on Hardcore SAD on Overgrown it was in Overtime, the bomb was planted and only me and this 10th Prestige Lvl 55 player had to defuse. By the time I got there, the other player had killed the remaining 3 guys of the enemy team by himself. And with 10 secs to go, he told me to defuse the bomb as 'you could appreciate the points more than me'. You know how it is, he could hav easily shot me and taken the points instead but no, he let me do it. The other players were puzzled as to why I should have been the one to defuse and not him but he was quick to defend his decision. Great guy.