Wisconsin's automobile license plates read "America's Dairyland".

That sobriquet is taken very seriously. State statute 97.18(5) prohibits the serving of oleo or margarine to any student, inmate or resident of a State Institution or University as a substitute for table Butter under threat of penalty.
Violaters may be fined not less than $100 nor more than $500 nor imprisoned longer than 3 months... or both.

Fines and incarceration times double for those found guilty of subsequent offenses.