&#62; Someone needs to figure out how to scale this model.<p>It sounds like your standard referrals-only community model (I love the idea of anti-SEO) but how could you keep elements further down the tree ("compromised" referrals, for lack of a better term) from unbalancing the community as it fans out into too many degrees of separation?<p>Perhaps with a one-level-down moderation model. Each degree of separation from the origin is responsible for moderating posts one level down from them, so in theory there is an unbroken chain of moderation from the earliest users to the newest ones.