What would happen if a private business decided to but up signs that banned wheelchairs instead of complying with accessibility laws? “No cripples allowed”. Heck, HIPAA laws make it illegal for somebody to even ask if you have a medical condition!
HIPAA does not make it illegal for anyone to ask if you have a medical condition, and it does not even apply to most people or businesses. The HIPAA Privacy Rule applies only to “covered entities,” which are health care providers, health insurers, and “clearinhghouses” like billing companies.
The ADA prohibits “unnecessary inquiries” into disabilities, but of course any business is going to argue that inquiring about customers’ potential infection with Covid-19 is necessary, plus there is a “direct threat” exception to the ADA.
I don’t like the mask nonsense either, but I don’t think there is any legal problem with a business excluding you if you don’t wear one, at least under federal law.
That would not be enforceable because there is a law (the ADA) that says they must allow those people. Until there is a law saying that private businesses must admit people without masks, those people may legally be excluded from the property.
Don't get me wrong, I loathe these mask requirements; however, I am being forced to comply.