this post was submitted on 26 Dec 2023
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How would this be done? Like you mentioned, anyone can run a modified instance of Lemmy that does not honor delete requests. I suppose you could put something that retrieves content from other servers as a pull operation instead of a push, but that's going to break Lemmy's ability to work with other ActivityPub applications (at the very least).
Delete currently renders posts invisible to most users. Delete should actually delete the post from the server.
It's impossible to ensure that the post is deleted from federated servers, web caches, clients that cache things, etc....
There are no guarantees either way. Even if the delete was somehow enforceable in software, it can be defeated with a simple server backup/restore of any federated server.
I think federated servers should respect any user generated delete request, but as users we need to expect that they wont.