Individuals have to be responsible for their own stuff.

The only way to proceed is simply to let the authors "moderate" their own articles. Registered users can add comments at the end of any article, and this gives everybody immediate access to additional value, which is good. But the author(s) of the article have the responsibility to clean up the comments. Vandalism should be removed immediately, and the offending user should be blocked from committing further acts of foolishness. Low-quality posts should simply be removed. Off-topic posts should be moved to where they belong. And relevant, high-quality posts should be integrated into the main body of the article, giving credit for the contribution to the comment author. In cases where the contributor has done a substantial amount of scholarship, it might be appropriate for the article author to share ownership of the article, forming a team to continue the maintenance of the article. And of course only the article author(s) can determine the value of a comment.

 

How will we select the experts on each topic to be the authors? We won't, because we are not universal geniuses either. Rather, anybody should be able to post anything (to the limits of the Site Rules), and they instantly become the experts on their ideas. If somebody posts a comment that gets rejected by the authors of the article, it might simply mean that it's time for the poster to author her own article, in which she describes the limitations of someone else's approach, and how a better job can be done in a different way.