So a .ML user posted a rant about bans, seemingly from real world establishments based on the wording, in a .ML group, and you felt it would make you seem normal to come in and take the opportunity to assume he was talking about .ML members being banned from other communities and to complain about .ML users?
Mirror.
I disagree with this specific aspect. I believe there should be reasons required to ban someone. Not just because you own the place and don't want them in your place as they make you/other customers uncomfortable.
As you state above, we have had to add protections for certain groups in the past as this is literally the justification for segregation in the past. But it's still relevant as it's the reason homeless people (for example) en masse aren't allowed in public places in the present, even if they're good people who have done nothing wrong. We also see it being abused with the allowance of a few "good ones" from said protected class to avoid discrimination claims while still discriminating against the rest of said class.