But this link is mostly content-free, and I don't think it's the type of link that inspires useful discussion. I wish that HN had downvotes on posts, though I suppose it uses several other methods.
Flagging a post out of fear of what might be said in response to the article is the aspect of HN culture I find least admirable. Flagging a post is not the same as downvoting. Flagging amounts to "I believe this article should not be read by anyone from HN" because a fully flagged Article (flagged by more than one person) removes the source link from view. That's a pretty serious statement to feel you can make on behalf of all the other readers of HN, and should be used only with the greatest of care.