Now I wonder what the monthly average is-- that might be a way of getting a sketchy view of cultural changes in LW, though it wouldn't tell you whether it's a change in the quality of comments or the culture of voting.
Or the number of voters. People seem in general to be more likely to vote up than to vote down. If people act roughly like a biased coin then we should expect the average karma to go up as the number of new users increases. Although there are other complicating factors such as the fact that comments can accumulate karma over time. Does the system keep track of when a comment was upvoted or just that someone has been upvoted?
A brief line from this comment indicates that the author of the cryonics-critical comment quoted here was perhaps not the one that deleted it.
Was it deleted by a moderator?
Honestly, the decisive downvoting seemed to do the trick of hiding it from casual readers who don't want to see the long annoying rants. I don't think it was casting any doubt on the credibility of cryonics.
While it sounds like the author regrets posting it, I would think they should be allowed to delete it themselves.
Edit: Originally titled "Cryonics critical comment deleted?"