So if a prostitute decided that she wanted to get an honorable job in the area where she was last arrested for prostitution, she could be arrested and charged with violating probation. So now we have laws that can forbid a person from merely stepping into a particular area of a city. Next they will be put in stocks in front of City Hall, I assume. But this is a contradiction in terms. A crime is an action by one person that harms another against their will.
Prostitution is completely voluntary for all parties involved.
One person provides a service and the other pays for it, and the transaction is done. Prostitution is therefore not a crime, but merely a vice. Unlike crimes, they imply no malice toward others, and no interference with their persons or property. Soliciting a john is a vice, because while it may bring monetary reward in the short term, it can bring disease and shame in the long term. It works the same way with johns soliciting prostitutes.