And actively harmful in implementation. It spreads bad information, confidently posted for others to trust and duplicate.

Bad information labelled with an appropriate confidence rating can be useful as a starting point to others. ("I'm not sure but this looks sort of like a rail spike nail, maybe start there?") But labelled as good, to others that can't label it themselves, it just degrades the average value of the other information and also the confidence in it too.

HN loves this "hack" and often tells others to use it but then unironically complains about the quality of answers on Stack Overflow and the overconfidence of Dunning Kruger