Send a support ticket with date and time when this happened. We'll make sure to check the chatlogs and impose a temporal 15 day ban to these players, main account included so it hurts. And those who got "cheated on" will get their items back. "Don't try to lose your item like that though..." If that users malicious practice continues after their ban and he continues to being toxic and trying to fool players, well...we'll have to disable his ability to get inside Rohan.