The league votes on a long, brutal TV series at the draft, and the loser must watch every episode and deliver a formal presentation on it, with the watch history as proof. One league assigned all 204 episodes of Little House on the Prairie, roughly 160 hours of television. The following year's loser got Seventh Heaven.
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.
The long haul: this is not a one-afternoon sentence. With a time commitment of several months, 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.