Ok, that suggestion is not really serious, but I thought that it might be funny and interesting. As far as I know, in Dayz's "lore" zombies detected people on smell, more than on sight. So, a player having a knife or maybe a hatchet could kill a zombie and than cover himself in its..... man I'm messed up... guts basically and other stuff to disguise himself for a period of time, as long as he behaves like zombie, walks slowly and doesn't use any gear. As long as he does that, zombies would tottaly ignore the player. But, to make it more realistic, a player could start.... yes i'm definetely messed up... throwing up, being immobilized every now and then, and getting hungry and thirsty faster.