We really need some law to stop "you have been banned and we won't even tell you actual reason for it", it's become a plague, made worse with automated systems giving out a ban
Do we though? It’s an important question about liberty - at what point does a business become so large that it’s not allowed to decide who gets to use it? There was a famous case here in the UK of a cake shop that banned a customer for wanting a cake made for a gay wedding because it was contra the owners’ religious beliefs. That was taken all the way up to the Supreme Court IIRC.
If you want to live life as a hermit, good on ya, but then maybe accept that life and don't offer other people stuff?