I disagree, I think there is still value in knowing where the link originally came from (the one that was posted to Hacker News), even if you get lots of second

I disagree, I think there is still value in knowing where the link originally came from (the one that was posted to Hacker News), even if you get lots of secondary traffic. Using referrer logs you can probably differentiate between "real" views from RSS and the ones that were propagated by a re-posting of that link.