found duping glitch in dayz have your mate put the shit you want in his backpack (works with anything guns,food,ammo) count down to zero at the moment he disconnects spam the arrow to the right to take the item and you both get it been geared as fuck by doing this alot now lol
From my experience, you will mostly ruin the gameplay of it and it will make you stop soon of playing it. Of course it is up to you but just my two cents.