From time to time I see comments like
Doesn't answer the question.
At best such comments are useless, since they do not explain what is the problem with the question - the same point is sufficiently well communicated via downvoting. It is a bit clearer when such a comment comes from the OP author, although they would also do better explaining what exactly they meant and/or clarifying their question.
At worst such comments can be perceived as condescending or as a presumptuous attempt to speak for the whole community (one could soften such a comment by preceding it with something like "in my humble opinion", but this is rare.)
I am wondering about other's experience with such comments. Should they be flagged or simply ignored? Is there a clear moderation policy in this respect?