I've had a lot of fun with this game so far, but the gameplay is currently not representative of what the developers have in mind. They say they're creating a zombie survival game based upon the ideas of community play and co-operation; work together or die sort of thing.
So I was pretty disappointed the first 3 times I was murdered by other players. At present there's a 'kill or be killed' mentality, though I hope that can change as there are more updates. Right now my mindset is, "well why wouldn't I kill that other guy and take his stuff," since there's no serious consequence.
Killing other players has become half the fun for me, unless there was incentive to play nice with the other people I'm not sure the game would be as fun.