A system that limits the number of posts individuals can make on a per-article or per-diem basis would go a long way to silencing overly strident voices which,

A system that limits the number of posts individuals can make on a per-article or per-diem basis would go a long way to silencing overly strident voices which, out of their sheer verbosity and pertinacity make it appear that their (often) extreme views are more prevalent and widely accepted than they in fact are. An alternative is to generate an in-forum currency that can be spent on comments, either on a per-post or per-word basis. This currency could be earned based on reputation--but as we see here on HN, and many other places, upvotes does not always go to the most thoughtful and engaging comments--or some other metric (statistical distinguish-ability of posts from the corpus of posts? not sure).