Funny enough, I run around without a care in the world, whenever I try to stop and be "tactical" or careful, I end up getting bored and running in carelessly and just looting without ever looking back. Also funny enough, the only time this backfired was once, when I tried clicking my first mouse button to bring my weapon up while going in to a air field in a fairly populated server, along with a friend. I ended up running in the air field while shooting aimlessly, and we were gunned down once we entered a building. Not something I recommend doing. Being the carefree guy that I am, I also casually walked off the roof of a hospital, because once I was there, I got my self a drink, and decided I'm not safe without my weapon, so I went towards the ladder and started drawing my weapon, and I just casually ended up walking off the roof. Also something I do not recommend. But other then that, shoot who ever you want, spare who ever you want, help who ever you want, rob who ever you want. DayZ brings out the survivor in us, and if your idea of surviving is gunning someone down before they get a chance to see you, you might survive, or maybe you will gather in numbers, which also creates a survival possibility. Whatever you want, what ever you do. If I spawn, run up to a geared guy and get shot in the buttocks, it's his loss, he's the one who lost perfectly good bullets. Small update: I also was fairly geared, saw a person once, he ran around a building and went straight for my face with an axe... I shot him in the stomach before the axe hit my face, and no that did not make me feel very manly, the guy had no gun, I really wished at that point that I could fix him up, but he showed no signs of life.