Possibility of marking a story as "not interested".
Marking a story as "not interested" means it will never appear on your pages anymore. It doesn't count as a downvote.
I tend to keep up with hacker news but I'm getting tired of eyeballing the titles of all the old articles I already decided I didn't want to check out + the old ones I already checked out and know I won't want to check out again just to find the new ones.