> Imagine a world where the only content you see is from publishers that you trust, and that your friends trust, and their friends, to maybe 4 or 5 hops or so, and the feed was weighted by how much they are trusted by your particular social graph.

Sounds like what Facebook was (or wanted to be) during its bes days, until they got afraid of being overtaken by apps that do away with the social graph (TikTok).