If you play smart, you can crouch run infront of a zombie that is 20-30m away and not agro. If the zombie is not facing you, you can get even closer. You have to be aware of the detection and noise levels you are at. Dont run on pavement or gravel if there are zombies near by....and most of the time if you do this you are in town which has lots of building. You can use just two buildings to lose all the agro(write little S with the building corners), since you are in a city or village this should not be a problem. Same goes to forests, bit harder tho.