Re:Ask HN: What causes a top 10 front page post to jump to s...
by dragonwriter on Thursday July 03, 2014 @08:08PM
(#7986615)
Comments can be downvoted, with sufficient karma (the down arrow next to the post does that.)
Stories cannot be downvoted (they have only an up arrow for upvotes). They can, however, be flagged (there is a "flag" link to do so between the time and the comment count.) Comments can also be flagged, as well as downvoted.
Things immediately went from good to bad in the matter of seconds, so there's alot of power in whatever ranking is required to "flag".