Voyager

That’d be cool, but it does sound more like something for Lemmy, or a 3rd part tool for Lemmy, to handle than Voyager (Voyager doesn't have a backend db).

^Tangent^ ^below...^

On your point about this being “a core part of helping to safeguard the Fediverse for the future,” I’d actually argue that defederation is more effective than something like Bluesky-style blocklists when it comes to addressing abuse and misinformation.

Defederation has two key effects:

• Direct effect: It cuts off problematic instances and their users, removing bad content. That’s useful, but I think the real power lies in the...
• Indirect effect: It puts pressure on instance admins to moderate responsibly and deal with issues like misinformation proactively. If they don’t, they risk being cut off. That creates a positive kind of "chilling effect," which I think is really effective.

It’s one of the reasons I’m so optimistic on the Fediverse. Defederation, in my opinion, is the most effective tool for tackling misinformation—specifically because of that indirect pressure it creates.

And there are even projects created organically to deal with the hierarchy of instance reputation and federation like Fediseer.

All that being said. I still think blocklists could have a role within Lemmy for some individual users who want to fine-tune their experience, but for the bigger problems—like misinformation and bot spam—I think defederation (and the threat of it) is a better, more effective solution.