Current implementation seems to focus on administrative domains for control, like email servers with individual policies and reputations. What if we look at this the other way?
People have different value systems. Are you ok with promotion for monetary gain? (No never / only individual contributors promoting themselves / only small businesses and below / yes) Are you annoyed by $controversial_topic? Do you dislike when bored people make a conversation game out of someone else’s need for obscure technical help?
The details can be decided later by people smarter than me. The point, though, is that these value systems aren’t universal. Users should decide their own.
Meta interactions (up down report friend block) should be aligned to these values. My client would gather meta-mod data as well as votes/comments. I could easily configure my client to hide things, or group similar distractions together and show/hide them all together. Your client could work differently.
I have no idea how we would possibly implement this with federation. Civically minded users create a meta-moderation identity with a PGP key, sign and publish their decisions, and let people choose to trust them based on past behavior?
Probably still flawed, susceptible to karma farming and cashing out. If well known mods start betraying their users, the bad activities are signed and can be used as proof they can no longer be trusted, though it could take days to get people to stop trusting someone.
Even the whole value system idea can be subverted. Dog whistles, toxic in-jokes, things which are offensive in context but seem fine judged later out of context, etc.
But I want this for us all. (And I vaguely remember seeing something similar on slashdot in the 90s) I have no idea if Lemmy can even support it though.