Comment by woeirua

The lines between the online world and the "real" world are always blurry. You might not care on HN, but you probably will care when you're trying to meet someone on a dating website and waste a bunch of time chatting with someone only to realize that they're a very convincing bot and that you've spent X hours that you could've been using to meet real people.

It seems like crowd-sourced moderation is probably the only thing that will work at scale. I've always wondered why Reddit doesn't rank comments by default according to someone's overall reputation inside of a subreddit and then by the relative merits of the comment on a particular subject. Getting the weighting right would be hard, but it seems like that would be the best way to dissuade low quality comments and outright trolling.