Last night I was in a team and we defeated the Boss. Someone looted the boss and didnt say anything. We were asking who got the boss loot in the team and never got a response. Someone selfishly horded it for himself. Soon after, the team split up and everyone was upset and untrusting of each other.
My suggestion is having text pop up stating "_______ can loot from boss", or something like that. That way, the thief can enjoy a bad reputation to go along with the loot.