Giant novelty eyelashes go on the loser's car headlights for a month. The car becomes visibly adorable and the loser becomes visibly uncomfortable at every stoplight. Roughly $20 of shame with unbeatable cost-per-humiliation economics.
The long haul: this is not a one-afternoon sentence. With a time commitment of one month, the punishment keeps paying out (for everyone else) long after the season ends. Long sentences need a written end date and a league-appointed enforcer who checks compliance.
Seen in the wild: reddit.com