You bring up a good point and I was just looking from the technical perspective. The method I describe handles content moderation 'after' it's already available

You bring up a good point and I was just looking from the technical perspective. The method I describe handles content moderation 'after' it's already available. It seems to me there should also be a system in place for content 'before' it's available so it handles the cases you mentioned. That being said I don't think it's impossible to have such a system in a decentralized way, there are incentive structures you could build to handle this.