Meeting a really well equipped survivor, repeating "friendly" on the mic and having him help accompany you to loot NW Airfield. And then proceeding to shoot him in the back and get a SAW with enough ammunition to last you a lifetime, a map, ALICE pack, morphine and multiple cans of beverages and canned food, a matchbox, hunting knife, map and night-vision goggles. I feel no regret in shooting this person, have you ever done something like this? (pretend you're friendly while playing and just backstab them for loot)