<p>There is, I feel, a problem user whose participation in this site is pretty appalling. They use the comments to lob out weak, critical remarks that aren't entirely rude/abusive nor off-topic, but show some disdain toward users on the basis of not being relevant to their interests. </p>

<p>I know that I and some other frequent users (esp. the site mods) occasionally drop comments like these when a question or answer is truly impenetrable. I make that assessment on the basis of my gut, but also on a lack of attention (low views, no answers, no comments). This user (unnamed) has no problem saying, e.g. "This is a meandering nonsensical question/answer" when there is clearly active, vibrant participation, upvotes, and so on. </p>

<p>It draws out a concerning point that comments are a rather tall soapbox for people whose stupid opinions would otherwise be shouted down into the ether (via downvotes).</p>

<ol>
<li>Is this kind of behavior kosher or flag for moderation?</li>
<li>If the behavior is kosher, is it kosher to respond in kind and say [in effect] "Just because you don't get it doesn't mean it's everyone else's problem." or such?</li>
<li>Would a comment downvote button be a good way to encourage better discussion?</li>
</ol>
