A wall-mounted plaque bearing bronze truck nuts and an engraved plate with the loser's name, displayed in their home for the year and passed down like the world's worst heirloom. Each year adds a nameplate. Real estate agents have asked questions during showings.
The long haul: this is not a one-afternoon sentence. With a time commitment of full year, 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.