I think that you should add some trading rooms on zombies so people don't steal items someone is trying to give to someone else.
its called Trade system, /tr username ( /traderequest to someone one) /ta ( trade accept from someone ) /td ( trade Deny from someone ) dont you people ever use it?
Yes, there's a trade system on zombies. Use /tr <name> to trade with a player. Thread locked, issue resolved.