The psychology of a car spam victim (flyer for a local garage band's performance, real parking ticket) is pretty funny to observe. When they pull it off their windshield, some will put it in their vehicle (to throw away later), some will toss it onto the ground (even if seem like they'd never litter any other time), and some will double-put it onto the adjacent vehicle (yes, even with real parking tickets).
I think you just left 118 pieces of litter (blowing off the parking lot into adjacent properties) at YC Demo Day. Hopefully you'll perform some sort of "green litter offset" trash pickup to mitigate the environmental impact. Perhaps that may be assigned to you if you're unlucky.
Still, some people actually do pay money for the fake v!@gra to keep spammers in business. The difference here is the other 99.99% of spam victims can't physically locate the spammer to clobber or harangue them.
A 6-months-later update to recount the results of this experiment would be a real service to entrepreneurs as either an inspirational or cautionary tale.