Most of the time it is just people online complaining for its own sake. But in games like Metal Gear Online, it can be annoying. In that game, you get more points for knocking an opponent out first, either through a choke hold or a non-lethal weapon, and there have been times where I've taken incredibly large amounts of damage just to get an opponent in a choke hold, only for an ally who did nothing but watch the whole thing walk up and try to get a head shot on the opponent I grabbed. Which in turn means I took large amounts of damage for absolutely no reason, and they were just sitting there watching until I was able to grab the opponent. And of course that's assuming the person is a good shot and headshots the opponent, instead of me. I never complain about it, but it does manage to greatly annoy me.