This issue actually came up (somewhat obliquely) in a real-life case here in central Illinois. I wish I remembered names and places so I can dig up a cite, but here’s the general outline:
Teenager in some small town (Illiopolis, I think, but that’s from vague memory) practices Wicca. He wants to host a sort-of Wiccan festival in the town park. In applying for the permit, he mentioned that he planned to have psychics, palm readers, etc. among other guests.
The God-fearing people of Illiopolis were having none of it, and dug up some law meant to protect the townsfolk from being scammed by Gypsies which prohibet “fortune tellers” from plying their trade in town. His application for a permit was denied.