Here’s an idea post a terms of service agreement on the door and on the phone screening that has a mandatory arbitration clause and a choice of law that involves the King James Bible. By proceeding inside or pushing the button to get to a human they are locked into arbitration and religious law which courts have upheld...
This is not legal advice, for that go see a lawyer in your state. All Disclaimers apply :)
OR, how about the bakery owner says #### you, and then when the feds come to close it down, there are 100 armed citizens in front of the store. Just a thought.
if i was a baker of cakes for weddings i would change my wording to say i just do weddings of persons who think that sex between persons of the same sex is unhealthy