Full censorship resistance doesn't mean never being able to delete posts, that makes it worse actually because the more time passes and the post still exists, the greater it has chances of being found, or becoming censorable content that wasn't before, and have greater consequences later
It'd be better for content to be "gated" of sorts, look at private trackers for example, you can't censor what you can't see and you also can't see what you're not invited to