There is no consensus mechanism in my proposed lists. They would be private to the user. The goal is to separate friends into unique feeds via NIP-51 kind 30000. This can already be done and is integrated. You can separate people into a list and generate a feed with only their posts. I believe this should be native to the workflow of all Nostr applications, though, making NIP-02 (follow list) a "kind" of list within NIP-51. Then replacing NIP-02 with NIP-51.

The idea here is to create unique groups of friends from the beginning. They are not meant to be shared, only maintained and appreciated by the individual user.

Web of Trust, however, does aim to curate lists in a decentralized method of emergence, which mirrors Bitcoin. It is the 'other path' of managing groups of users, which would entail deciding "who belongs where" as well.

Both paths require a manual creation of friend groups/lists. Web of Trust offers an automated path in the future.