1.Just shoot around in the city no zombie
Even if they do they are so close to us like 50 meters above 100 meters,. No way
1.just loot a lot in town and cities then you will understand
1.they can see miles away from people,, just find a zombie, dont go near to him,just 300m-1km radius then it will chase(i remind you.i!m chased while on top of the hill)