Any serious news source should have something like a professional "comment moderator" and division of "top comments" selected by the editor and the general discussion only below. "Crowd wisdom" only works for groups of knowledgeable people that are also skilled in online communication - take HN or SO. It doesn't work with things like science popularization articles because 99% of readers lack not only scientific/technical education (and this is ok, because the articles are written for them to understand) but also basic reasoning skills and common sense factual communication skills (eg. most people are taught to make themselves heard and promote their opinion and not to STFU when they have no idea of the topic). And then you automatically have the ones distorting the facts to promote their interests - and these people are actively drawn to "science for the public" kind of places!