But here's the other, other part: keep the site open for writing as well, but make the non-elites' contributions only visible when you are logged in as a non-e

But here's the other, other part: keep the site open for writing as well, but make the non-elites' contributions only visible when you are logged in as a non-elite. Then the elites can continue their excellent discussions unhindered, and any passing stranger can browse the elite discussions: yet everyone can have their say in the agora.