Let me tell you a story. I was sneaking around a little town in the country side (I'm a solo player, I avoid people so far), when I saw 2 guys running, followed by 3 zombis : "Help us, please ! oh my god ! help", I heard. I stood up, I ran towards their direction, and killed those zombies with my riffle, and talked with the 2 guys I just saved. They were noob, and couldn't thank me enough. I went with them so as to get some weapons for both of them. I found them 2 hatchets, 1 makarov, and 1 crossbow : enough to survive. I could have killed them both so as to get some bandages, and maybe ammunitions. But I did not, because I'm the good type of guy in this game. I prefered helping them. As soon as they put hands of their fresh new weapons, I ran and discretly disappeared in the woods. They never saw me again. I'm a friendly survivor.