Interesting your post and perhaps there could be a solution to prevent any abusive content is saved forever in the blockchain. There could be a policy that would allow auto-delete a post (using flags and downvotes) within 7 days. Obviously, for this, it is necessary to comply with a series of mechanisms that allow refuting the auto-delete process.
Well, it is simply an idea that could serve as a solution 😊
Might be something to reflect about, indeed.