This is a truly heroic effort. I think you make a valid point that a domain can't be considered a public square, but am not convinced that the domain name regis

This is a truly heroic effort. I think you make a valid point that a domain can't be considered a public square, but am not convinced that the domain name registry system can. DNS itself (in the form that gets used publicly) is controlled by a few actors -- arguably the 'true' owners of all the domains that are leased from them. This is underscored every time new TLDs are released and people have to scramble to secure their names and brands. In that context alone, DNS also can't qualify as the public square.