1) The only teams are ad-hoc and the servers are sparsely populated. You can go hours without seeing another player. 2) When you spawn, you have very little i

1) The only teams are ad-hoc and the servers are sparsely populated. You can go hours without seeing another player. 2) When you spawn, you have very little in the way of equipment. You have to dig through abandoned houses to find a lead pipe, much less a gun. You wouldn't be able to kill an established player. 3) Following from 2), people would catch on and kill you quickly. It's certainly possible, and people certainly do it, but griefing in DayZ is really unrewarding. You wouldn't be able to do it without a huge investment of effort.