I originally wrote this as a comment on a post which had negative net karma when I first saw it. I figure what I wrote is worth also posting to the top level, so that it can have more chance to be seen and thought about
When I came upon this post, it had a negative karma score. I don't think it's good form to have posts receiving negative net karma (except in extreme cases), so I upvoted to provide this with a positive net karma.
It is unpleasant for an author when they receive a negative karma score on a post which they spent time and effort to make (even when that effort was relatively small), much more so than receiving no karma beyond the starting score. This makes the author less likely to post again in the future, which prevents communication of ideas, and keeps the author from getting better at writing. In particular this creates a risk of LessWrong becoming more like a bubble chamber (which I don't think is desirable), and makes the community less likely to hear valuable ideas that go against the grain of the local culture.
A writer who is encouraged to write more will become more clear in their communication, as well as in their thoughts. And they will also get more used to the particular expectations of the culture of LessWrong- norms that have good reason to exist, but which also go against some people's intuitions or what has worked well for them in other, more "normie" contexts.
Karma serves as a valuable signal to authors about the extent to which they are doing a good job of writing clearly about interesting topics in a way that provides value to members of the community, but the range of positive integers provides enough signal. There isn't much lost in excluding the negative range (except in extreme cases).
Let's be nice to people who are still figuring writing out, I encourage you to refrain from downvoting them into negative karma.
Eh, I hate strategic voting. "Yes means yes, no means no" has a certain elegance that "I mean no, but I am saying yes because other people are saying no, except now there are suddenly more yes's than no's and no one knows whether that actually means that most people agree or that too many people are voting strategically" misses.
A bad article should get negative feedback. The problem is that the resulting karma penalty may be too harsh for a new author. Perhaps there could be a way to disentangle this? For example, to limit the karma damage (to new authors only?); for example no matter how negative score you get for the article, the resulting negative karma is limited to, let's say, "3 + the number of strong downvotes". But for the purposes of hiding the article from the front page the original negative score would apply.
(Or maybe, in addition to upvote and downvote, there could be a third kind of vote, a "no-vote" that gives 0 karma, and only appears on the articles of new users? Meaning "I don't like it, but I don't want to discourage the author". But the author could see e.g. total karma +1, 100 votes, so clearly the article was unpopular rather than unnoticed.)
Well, at this moment the article has a +4 karma, and what exactly that means? The article was actually popular, it just had bad luck because the first readers didn't like it. Or the article was unpopular, but many people who didn't like it upvoted it anyway because... reasons? No one knows. And that is a problem, IMHO. The tool made to provide a signal now generates noise.
Ah yes, we should somehow encourage new members to try their ideas in comments rather than articles. More Open Threads perhaps?