Wis. Stat. § 103.30: Penalty on newspapers for allowing minors to loiter around premises.

A newspaper publisher or printer or person having for sale newspapers or magazines shall not permit any minor under 18 years of age to loiter or remain around any premises where the newspapers or magazines are printed, assembled, prepared for sale or sold when the minor is required under s. 118.15 to attend school. Any person violating this section is subject to the penalties specified in s. 103.29.