In person conversation and online conversation are very different. Just like the mechanics of picking a lock and hacking computers in another country are very different.
Online conversations can be unintentionally published with mistakes (even the best of us make typos or post to the wrong chat), and the blast radius is much worse.
Online conversations are much easier to misinterpret due to lost context.
If it’s a public figure or a company doing something shady, yes, it’ll end up on Internet archive.
If a user wants to remove their selfie; you let them, because it’s their content.
Whether another site violates gdpr and data deletion requests doesn’t mean your site can too.
Lemmy and kbin should be respectful to the user and follow deletion logic, just like how you can delete a mastodon post and other servers will respectfully delete it.
Yes, someone might have scraped it, No, that doesn’t remove your liability just because it’s up on someone else’s copy, And even if you aren’t under liability you should treat your users well.
It’s the right thing to do.
If only restic deduplicated… But other than that it does okay.