More and more often recently, I find downvoted comments that I thought are all perfectly useful and reasonable to the discussion. I in fact thought the downvotes were neither "useful" nor "contributing to the discussion". I would rather like to downvote the downvoters to reduce their karma and their power to perform these downvotes, but the only mechanic I have on HN to express my preference is to re-upvote the comment, which is not in fact its original intended purpose.

Rather, I would like to ignore all downvotes made by particular downvoters because I believe their judgements are highly flawed, independent of the quality of the original comment that was downvoted.

https://abstrusegoose.com/527 is highly relevant.