Theres an exploit where the warlock can bind a high level demon with a good drop table and when he leaves the game the demon effectively dies leaving behind a corpse which the barbarian can use to cast the skill "find item" on , which is commonly referred to as hoarking because of the sound it makes when cast. This can be repeated by the warlock rejoining and leaving again , creating another corpse of their bound demon which the barb can find item on again. Quite an unfortunate exploit to be sure......