Wisconsin Cracks Down on Sex, Drugs at Nude Beach Wisconsin officials have long turned a blind eye to nudists who flock to a beach about a half hour north of the capital - but they draw the line at public sex. Officials say arrests for drug use and illicit sex at the beach on the Wisconsin River just north of Mazomanie spiked last year. In just nine days of surveillance, wardens arrested 42 people for illicit sex or drug possession, up from 14 in six days in 2007. To try to curb the bad behavior, the state Department of Natural Resources said Tuesday it will close down huge expanses of the woods around the beach in hopes of forcing people into clear view. Nudists aren't happy with the plan, but other river users say something must be done.