So i guess it's considered fair to institute a new rule and then immediately ban everybody who violates that rule without giving them any advance notice or grace period to begin complying with the new rules?
The dude is obviously within his rights to ban anything he wants on his private property, but it can’t be the world’s public square if he does so.
Yes, it does. Power is what you can do.
> A functional society finds ways to hold unchecked power accountable for pettiness
This doesn't make sense. Unchecked power is not accountable.