I have a robot that used to do that, but it provoked an extremely strong negative reaction from a sizeable proportion of the community. I discontinued its use, and after some of the comments, I'm reluctant to bring it back.

Doing it in the comments with a bot.. yeah, I can see why that might've struck a nerve.

But it's the old usenet problem. FAQs I don't think would work here though.

I was thinking more as a collapsable "see also" section added only to duplicate articles.

Update Added reference to usenet.

It sounds useful, but I fear that new comments would be buried in the old comments, particularly if old comments retained their points in determining the ranking.