The loser must keep one specific, widely disliked player on their roster into next season, burning a keeper slot on the league's designated albatross. The player is chosen by vote and by spite. Watching the loser start him in Week 1 is a league holiday.
The long haul: this is not a one-afternoon sentence. With a time commitment of next season, 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: fantasyleaguelottery.com