As soon as you have more than two people you have politics, regardless of whether it is small "p" politics or big "P" politics. Politics is a function of human communities, there is a 100% correlation.
I suspect what you were looking for is not "no politics" but "be conservative in what you say and liberal in what you hear", i.e. think more of the group than yourself. Or for those who can't read between the lines; "don't be selfish".
No, I mean strict ban on sight no politics like it helped usenet and irc communities in the 90s and helps slack, discord, reddit and other forums right now. Stay on topic or gtfo.
Again, it's been tried. Doesn't work for a place like HN that doesn't limit itself to topics where touchpoints with politics can be completely avoided. If you think otherwise, at least have an argument for why it should work better this time.
I suspect what you were looking for is not "no politics" but "be conservative in what you say and liberal in what you hear", i.e. think more of the group than yourself. Or for those who can't read between the lines; "don't be selfish".