Comment by blucoat

Perhaps the filtering would also be done by a third party. This isn't entirely foreign now: if you write an article online, you can't control the comments on reddit, HN or 4chan. However, users have some control over which comments they see, in that they can select which sources of comments they want, and each source has different moderation policies. The roles of publishing content and moderating comments are totally de-coupled from each other.