This is just for all the people that DIDN'T take the time to read through the pages.
He said Aimbot wasn't going to be in this most likely.
My idea though it may seem simple/impossible is:
Have the NPC in fireteam[black lung/Cabin Fever] Not see[or run] at you.
1.) They don't run at you when your at *** distance from them.
2.)They don't know your even in the room, but you can still kill them.
If its stupid question, well... I'm not a coder. Just a hack that would really have fireteam a bit easier to do.
500 zombies walking at you is easier to kill then 500 zombies running at you.