The value of downvoting, or, how Hacker News gets it wrong (2009)
Interesting, making downvotes costly seems like a good system. Though downvotes seem to work pretty well as-is for HN, I rarely see dead comments that were killed by downvotes rather than anti-spam features.If we take HN as reddit 2.0, what would  be HN 2.0 I wonder?  If I were the one to make it I'd create a system to promote the comments of people with professional expertise on the subject being discussed. HN has mostly solved the politeness and flamewar issues but IMO one its major flaws is that people speak authoritatively about things they don't know about.