Yeah.. alot of this is a judgement call.
I've been hit... even caught it on vidio, and never felt it. I thought the guys GBB jammed because it was point blank. Ends up it ricochet off my suspender somewhere.
So, if your unsure, either callyourself out.. or if your the shooter, give the guy the benefit of the doubt.
That said... some people have a 'reputation'. My theory is... the worse the reputation... the more ammo is required for a kill. Heh, I don't mind holding a trigger down for a 50 round burst. They'll either learn, or people will get sick of them.
When the going gets tough... the tough go cyclic.