Yooo imagine this painting, but itβs me coming back from Olive Gardenβ¦but the wands are breadsticksπ€€ nostr:note1pfa6ucpag604nx7658qj4az055505el8mq9rfr2060tcecs0lf3qkyp2lj
1) It's not possible from a cryptographic point of view;
2) We don't have any official solution, only some proposal to invalidate and promote a new key pair; one solution by nostr:npub1l2vyh47mk2p0qlsku7hg0vn29faehy9hy34ygaclpn66ukqp3afqutajft uses a secondary key, similari to what you envisioned, to signal (via clients automation) the burned key and to autofollow the new one.
It's an important issue and I agree it's critical to address it for mass adoption. I think we will use bunkers, probably multi signature (so mainly custodial, but with a good overall security) and key rotation will be used only for exceptional events.
Any of the people you follow could too π€.
It's not so much about finding good accounts or filtering content, but more about having an as large as possible number of legit accounts while filtering out spammers and bots as good as possible.