It seems every new open web community tries desperately to stave off its own Endless September. I think a scalable answer will probably look more like multiple

It seems every new open web community tries desperately to stave off its own Endless September. I think a scalable answer will probably look more like multiple layers of authentication. Only some actions can be completely public; you have to be respected before you are allowed progressively more reign. That is what our society does with kids and things like drivers licenses, college degrees, etc.