The UW-Whitewater Absolute Sobriety problem
Wisconsin's § 346.63(2m) Absolute Sobriety statute makes it unlawful for a driver under 21 to operate with an alcohol concentration of more than 0.0 but not more than 0.08. For UW-Whitewater's student population, the practical consequence is that even a small amount of alcohol can create license and court exposure that an of-age driver would not face at the same BAC.
First-offense Absolute Sobriety is a civil forfeiture (no jail, no criminal record) but carries a license suspension and an alcohol assessment. The conviction can also matter under § 343.307 if there is a later OWI charge. The civil-forfeiture treatment of the under-21 case can disguise the future exposure.
The defense to an Absolute Sobriety case typically focuses on the validity of the initial stop and the chain of custody on the BAC sample, since the threshold is so low that calibration deficits and timing-of-test issues become magnified.