Yes, it’s absolutely possible. The biggest piece of building a solution is a distributed reputation and identity system, which is what #Nostr essentially is. The frustration is that trust rankings have to be built slowly, and also require explicit “trust network” sorts of tools which are incredibly nascent right now. I would look toward Satlantis for how they are implementing the idea of trust weighted connections and web filtering.

In addition to Satlantis, I'd recommend you look into @david 's influence score and subjective, contextual, transitive trust.