Say there was an exploit whee you could run around with no recoil on your SMG, people could strap on Rapid fire and EX mags and just mow through people.
Now say people on your team were doing it but lost the game, the other team would shove it in your face and call you out on the cheap tactic or tactic that mad them mad.
This is what it's like but not to the exploit level, if you're making them mad and they win they'll call you out on it and celebrate.