The loser enters a real community talent show with a genuinely unrehearsed act the league selects. Filmed from the back row, slow zoom included. Competing against actual talented children is the psychological core of the punishment.
Heavy sentence
Severity 4 punishments are the ones people talk about for years, which is exactly why they need full league buy-in before week one. Put it in the constitution, set the deadline, and agree on proof requirements up front.
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