blocking instances for users was added in 0.19. it works like community block: you don’t see any posts from an instance, but you can see the activity of users from that instance on any other instances where they do stuff.
https://github.com/LemmyNet/lemmy/pull/3869
[this is not an endorsement of federating with any meta product. i believe in deplatforming hostile actors, which they’ve well and truly proven themselves to be.]
presumably the idea is just to use/interact with the device on one’s own terms, rather than being harrassed by it into engagement?
i do both, but they’re different things.