Some people just take this game way too seriously. I was in a mercenary dom lobby, and some guy on our team was just steady raging, calling us fucking idiots, not calling anything out, "Look, that guy on the other team is 25-0, he's got a MOAB, thanks to you morons for not saying where he is," and finally a bunch of us plugged our mics in and smacked him down, another guy on my team was like "Dude, shut the fuck up, in case you haven't noticed you fucking noob, most of his kills came from air support, you gotta kill people with your gun to get a MOAB, are you old enough to play this game" and so on and so forth.
Then there was another game where a kid was raging like the dude above, except this kid had to be no older than like 13 or 14, dropping F-bombs that would make the hardest of the hard blush.
Good grief, it's just a game.