most people i see complaining they got "lit up" didn't i have seen dozens of people scream bloody murder at someone because they took a ball to their hand when they were first sticking it out of the bunker to call themselves out. or walking sideline with gun down and taking a shot from renter, or after getting hit 5 times, all bounces.
in all honesty i think it depends on distance, if im 20 feet from you you should only have 3-4 going your way tops, if im 100 feet from you, you may well call yourself out and walk directly into the next second of stream going at your bunker, that's on you for not having any sort of awareness.
those are my feelings on rec play, if someone shoots me 4-6 times its no problem,
in a practice recently i took 10 shots to the back/side of head from about 10-15 feet, and that was acceptable to me because only one or two broke, thats how i feel about practice.
in an event, whatever isn't counted as a penalty depending on if that team has been cheating their asses off.
for walk on if its not a renter i shoot until i see a ball break or an arm go up on 8 bps semi, if it is a renter i send 2 or 3 their way.
if its a team practice i shoot until i see an arm go up or breaks on psp ramping
event i will shoot until i see arm go up/player leave bunker on whatever firing mode it uses.
oh and i would say in rec ball getting "lit up" should be a few strikes you're out offence, more strict depending on situation, but i don't think taking 4-6 shots is being lit up either.