Question: Milwaukee prostitutes, who had been arrested on multiple occasions, sued to block the city from enforcing a court-ordered injunction that permanently enjoined them from engaging in certain specified activities in certain specified areas of the city. They were prohibited from "engaging in beckoning to stop, or engaging male or female passersby in conversation, or stopping or attempting to stop motor vehicle operators by hailing, waving of arms or any other bodily gesture, or yelling in a loud voice" and other such activities. The women challenged the order on constitutional grounds.
a. Explain the nature of that constitutional challenge.
b. Decide the case. Explain. See City of Milwaukee v. Burnette, 637 N.W.2d 447 (Wis. App. 2001); 638 N.W.2d 590 (Wis. S.Ct. 2001).