Shave only the top of the head, leaving the sides and back untouched, the reverse of every haircut ever requested. One Reddit league credits it with the most competitive season in their history. Hats may be banned for the first week, check your league constitution.
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 one hour, months of regrowth, 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.