When posting or saying something in public, there’s no way to retract it.

There’s no difference from posting something on “the Fediverse” or Reddit. Just because you delete your post, does not guarantee that it’s gone. Reddit most likely keep a copy of it anyway and there’s sites that save everything that’s posted on Reddit. so the “issue” is not exclusive to Lemmy.

What you want to aim for is anonymity.

I wish I also could say Trump is dumb on national television.