> My concern is trying to parse social signalling. Downvotes can express rebuke of undesirable behavior here. Ignoring that fact is not a good thing.
My point, which I didn't convey entirely well, is that you can't use downvotes as a signal because there is no agreed upon criteria for when they should be used. Don't agree with the comment? Downvote is fine. Don't think the comment is on topic? Downvote. Have an emotional response to the comment? Downvote. I'm not sure how you can pull signal out of that noise.
I say ignore downvotes because they should not be used as the anti-validation of an idea, thought, or concept. The groupthink can be (and often is) wrong.
> It has been extremely helpful to me that really ugly comments aimed at me are often flagged to death.
Flagging does have guidelines for their use, and ugly comments should (IMHO) be flagged to death. There is a line between disagreement and incivility, but that's what HN mods are for (thread detachment, ban warning, bans) and their attention can be requested with those flags.
With all of that said, I think the HN moderators are fairly astute as to whether someone is participating in good faith, and taking corrective action if they're not. Sorry if we've gone off track. People are hard ¯\_(ツ)_/¯ Assume positive intent until observation proves otherwise.