Also consider this, about deletion: Yes, it hides the data from an extremely large majority of users on the site. But, as stated, 10k users still have access. And literally *anyone* can become a 10k user - for the practical purposes of this discussion, there's really no discriminatory selection or vetting process in place.
In fact, the people who might be able to exploit the leakage of data which should be redacted are also extremely well-equipped to *become* 10k users.