It’s possible that relays could also give badges to good actors or similar to help other relays more easily detect spam. And other relays could trust certain relays for accuracy.

It may need some kind of WoT, as badges like ‘100 days without creating spam’ for a pubkey, you just lead to spam account pre-creation.

Accounts with less milestones/badges could then be more heavily scrutinised for spam (e.g more computationally expensive spam checkers, flood detecting, higher publish throttling/lower rate limits, etc). Maybe reactions/reposts are not counted in totals until they pass some gates.

It kind of flips the spam detection from being check everything to check highest risk - which can scale much better. Only downfall is how much does it impact new identities? And for how long? It’s possible it could be almost invisible.. or abused as a censorship layer.

Could be a cool gamification layer.