Perhaps setup, organize, and advertise an 'assassin service'. We basically are 'murder for hire' and for a nominal fee, we will kill whomever is at the faire that a foe/friend/family-member wants dead. It will be more of a 'for show' thing, with a little scroll given to the victim, made before the faire, stating 'Thou are dead, courtesy of The Black Company' or something to that effect. With every kill, we are loud and obnoxious (and also advertising the assassin service, too). It could be something silly, such as waiting for them to buy a drink or food, then running up to them screaming 'Ha ha! You've been poisoned!' or stabbing them with a rubber dagger. Nothing to violent, we don't want to freak out the mundanes. Perhaps we could have a mishap or two, where we accidentally kill one of our own in an attempt to assassinate someone, making it a gag or something...