Recently I have noticed the comments becoming more irrational and immature, especially considering the issues being discussed are not that important or meaningful. However, I do appreciate when people get passionate and want to share their particular knowledge and experience.
Therefore I propose an editorial system of promoting certain comments and discussions relevant to a post, with the rest of comments still accesible via a link to those that would like to venture through them. It would have to be fair, so different interesting opinions would have to be respected and included.
I think this would improve the overall experience to those that just like to be informed and catch up on recent stories, but not be distracted by trolls and idiots. When you are feeling curious, well, there is always the link.