Bluesky wants to do a federation, sort of like Fediverse/Mastodon but with cryptographically guaranteed identities not tied to your server. So apparently the pu

Bluesky wants to do a federation, sort of like Fediverse/Mastodon but with cryptographically guaranteed identities not tied to your server. So apparently the public blocks thing is required by the way their federated protocol - which is presently vaporware - has to work. Now, you or I might think that if your idea reaches an absurdity like "blocks are public", then you've hit a reductio ad absurdum and you need to go back and check if your idea is actually good and not terrible. But the Bluesky crew are ex-crypto-bros, so they don't think like that.