I enjoy discussing things with people who genuinely can be persuaded their original viewpoint is skewed in some way. I also try to come into any conversation with the knowledge I could very well be wrong.
This site, being the overly educated bastion that it is, often does engage in real, honest, engaging discussion. Sometimes we engage in pedantic silliness. Perfection is hard, no? Anonymous comment sections on local new sites are several steps down the conversation quality ladder. Somewhere between “populist drivel” and “cesspool”.
Forums can work because they develop a sense of community about them. That sense of community can run the gambit between 4chan/b (or more locally-ffx) and something more like here. But at least its not news story comments. Which can only be one upped by youtube comments.