Where a store will allow it, the loser gets on the intercom and publicly apologizes to shoppers for their draft picks. Fifteen seconds of retail radio infamy. A written apology read at full volume near the registers is the fallback.
Budget note: this one costs nothing but dignity, which makes it a strong pick for leagues that would rather spend the pot on the champion than on the loser's downfall.
Seen in the wild: scoutcast.ai