There is already forced login for tagged adult subs, as well as a quarantine mode that embed the affected subs to your timeline rather than accessible as its ow

There is already forced login for tagged adult subs, as well as a quarantine mode that embed the affected subs to your timeline rather than accessible as its own subdomain. If anything this has already killed much discoverability because search engines are prevented from crawling and their in-house search is useless anyway.