I used to have fun creating a bnet game and dropping gold one coin at a time on the ground. Sometimes I'd fill the whole encampment before someone came it. Of course, I'd make a level 1-5 game, so when someone comes in, they sometimes start picking up the gold, one at a time. Dont drop gold.
people used to be crazy inventive at this in Ultima Online. they would use cheap things like colored cloth and create aquairums, swimming pools and everything else. I am not sure of the network system of Diablo, but I imagine it could cause lag for multiplayergames.