Also note that dang is already pretty active here banning people.
It is a topic where deep emotions come up and where fanatism is widespread. Also among educated people. Also not sure if you have not noticed before, but HN is part of a profit orientated venture capitalist company. Still, I also do enjoy this Oasis here. But I don't see how it can scale in any way you seem to imagine.
I don't have any delusions about ycombinator seeing some of the things it has supported recently, but in this laughably dumbed down world you take what you can get.
As for new communities I believe in being selective and restrictive- based on location, education, or interest and think it's the only way we can get smart communities again. Think how the tech barrier and slow adoption in the 90s/2000s resulted in a smart bubble online, and how covid was the death knell for distinct non homogenous smart online spaces because it brought everyone further online. It's discriminatory but look what we've become.