Dont know if this has been mentioned before but I just rubbed a lamp and got a hostile genie in attnam. Before the genie had a second to cut me to shreds the townsfolk surrounded him and cut him to shreds.
downside? they then immediatly absconded with his primo equipment.
I guess if you want to take a chance early in the game with a wish, its a good way to prevent being killed by a hostile genie.