Dude, take a chill pill, we play a game where people get shot, me included, & if I'm a dead man walking ill do my best to not walk through a firefight, but if it erupts around me I'll do my best to move aside or take cover (with a hand up), & if I'm inadvertently hit, accidentally or not, I take it, after all, I'm a dead man, I can't influence the play in any way, & everyone has paid the same to be there, roles reversed I'd keep playing too.
As for marshalls stepping up & "punishing" people, good luck finding one with enough backbone to step in, or even identify a problem, they're usually huddled together in groups or on their phones.