Actually instead of counting down-votes HN software could just count how often a post was up-voted and then that vote regretted (reversed) and adjust the visibi

Actually instead of counting down-votes HN software could just count how often a post was up-voted and then that vote regretted (reversed) and adjust the visibility to boost or silence. But that is still susceptible to misuse so there should be a limit on how often that would count.