Moderation is something I've been think about lately. So fare the best idea I've come up with is "hide all posts by default", then randomly show a post or comment to something like 5 - 20% for the other users. Only when a post then reaches some level of likes/upvotes/whatever will that post open up to comments and be visible to all other users of the platform. If it fails to reach the required number of votes in 24 hours is will just be deleted.

Most social media platforms are simply to big to moderate in any meaningful way, in my opinion. AI has so far show to be ineffective, as show by comments and open letters from Facebooks human moderation staff.