That's related to the "Brown M&M Test", as named by the detail in the Van Halen tour rider, and used by some people as an immediately visible indicator that the venue actually read the technical specs. If you see a "brown M&M", you know you need to double-check every last detail of the contractor's work. If you don't, you can probably get away with random spot-checks.

In the end, someone has to actually get paid to squeeze the oranges or pick all the brown M&Ms out of the bag, but that cost is insignificant in the face of reassurance that the person with whom you are doing business is reliable and actually listens to you.

The crazy request may only be in there as reassurance that all the mundane details are being handled appropriately. If you screw up the barbershop quartet singing "Copacabana" to arriving guests while wearing Nicholas Cage masks and holding two quarters of a muskmelon apiece, with seeds, then you just might screw up the cake-cutting ceremony, too.