Ask HN: Why is down voting disabled on some submissions?

If the comment is over 1 day old, you can&#x27;t downvote it anymore. See, you can still downvote this comment on that thread because it&#x27;s only 18 hours old. <a href="https://news.ycombinator.com/item?id=8081863" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=8081863</a>

You can downvote? Does it come with higher karma?

A better title would be &quot;Why is down voting <i>on comments</i> disabled on some submissions?&quot;