Interestingly, I've noticed just about every well upvoted story on /r/netsec will hit the HN front page 2-3 days later.
Arbitrage opportunity there: submit them to HN yourself.
I've been guilty of doing that before. Also, from top r/reverseengineering, though that subreddit is a little less traveled so doesn't get as many comments, so it's interesting to read what HNers think.