mister_monster on Nostr: 100% a good idea IMO. The problem is, how does this get implemented? Relays can ...

100% a good idea IMO. The problem is, how does this get implemented? Relays can require it, but they'd prefer to just require a zap which is purchased PoW, if a client allows users to require it a user might want to turn it off because they already follow people with keys that dont have it already. And how does it get communicated to others? If I send a guy a message, I want to know that he won't get it because my key isn't compliant with his requirements.