Wouldn't it be better to leave that to a moderator, but allow the set owner to report a post they don't like? I might want to comment in jest, and some people can't handle that. "Sweet set but your missing issues 1 - 27..." or "Weak, those are all restored..." Which is why I keep my Action set obscured!!!
Either way I don't see it happening. At best, they would introduce a "like" system the way it was introduced on the boards.
Oh and why would I be missing issues 1-26 when the set name is "Detective 27-200" Those fall under the "Detective Complete" set.