Maybe a simple weighted vote (relative to how new is the member/karma) would solve the problem. Or at least the mean from random sample from older members and

Maybe a simple weighted vote (relative to how new is the member/karma) would solve the problem. Or at least the mean from random sample from older members and another sample from newer ones, and use variance to check if there is significant difference, and maybe register another sample from members who are voting through the like button (but haven't already gone to the article from HN). A simple comparison of IP timestamps would help doing that. (these are just suggestions I have no idea how the current algorithm works)