I"ve only been playing just over two weeks, the Z's arent even an issue, easily avoided or dispatched of, even with an Axe... The game quickly becomes kill or be killed, you either avoid everyone altogether or you sell your soul and put a bullet into anyone that you see . And believe me, after the first 10 or so deaths from other players when you're minding your own business will quickly change your mindset... I'm still yet to go down that path though. I die then start again, go another route, a less populated one... I'm also yet to meet another player that doesnt want to kill me which is a shame really.