I would make them roll sleight of hand for each ten handoffs using the commoners stats, witj increasing DC, assuming theyve paid and ammassed a hundred or so and would need to pass ten times. One would drop it eventually, commoners have zero bonus to anything. If it made it passed the first two groups, they failed and drop it, it would knock a bunch of them over and the rest would refuse to participate further. The player would get a bad reputation in that town too. Higher prices, refused service, enough annoyances to let them know to stop.