If I don't want to see profanity, I should be able to set my filter to exclude profane comments. If I don't want to see nudity, I can set that filter too. Just like movies get a certain rating (G, PG, R, etc.), we should be able to properly label data.
This is basically what he describes in the article as a form of moderation: "If you wanted to get fancy, you could have a bunch of filters - harassing content, sexually explicit content, conspiracy theories - and let people toggle which ones they wanted to see vs. avoid."