In the context of criminal statutes, we have stated that “when the alleged conduct of a defendant plainly falls in the prohibited zone, the defendant may not base a constitutional vagueness challenge on hypothetical facts.” State v. Pittman, 174 Wis. 2d 255, 277, 496 N.W.2d 74 (1993) (citing State v. Courtney, 74 Wis. 2d 705, 713, 247 N.W.2d 714 (1976)). We find the logic of this principle to apply with equal force in a challenge to the rules and conditions of supervised release under Wis. Stat. ch. 980.¶54.