Of course, in a video game, NPCs won't improvise, but I guess it's a useful advice to tie NPCs in their environment and not just have them being some sort of isolated entities.

That being said, as both a d&d player and a RPG videogames players, what I would really want from NPCs in videogames would be for them to stop being just "switches", which I activate using an action button and who provide always the same text. The videogame which allows discussion with NPCs to be initiated by a question asked by the player will get all my attention :)

When Digg introduced voting on links, it was initially seen as having way better content than the rest. And then Reddit did it with comments as well, and nobody looked back.

The main reason, I think, is that nobody read a whole thread. They look at the few top level comments (in upvoted threads) or at the last ones (in a forum/mail threads) and will reply to that - so that the quality of the whole discussion is determined by what people see first.

That being said, it indeed comes with a lot of problems of its own. Upvotes/downvotes favor hive mind thinking (you want to be loved, so you'll give people what they want) and mobs (if something is downvoted, you'll just add one more downvote).

A couple years ago, I went back to using mailing lists and it's indeed a less frustrating experience, from my point of view. But I'm not sure it's about the technical aspect, it may just be because there are just less people in it.

Out of curiosity, do you have any leads on what may replace a voting system for emerging insightful content? It sounds like a job for AI, but I guess any bias in it would be hated even more passionately.

That being said, without considering our own opinions on a given topic, you can easily reproduce the experience of visiting random HN threads and finding a well written dismissive post on top of the thread, no matter what the subject is, and almost systematically (and thus, when someone is interested in the topic, that's the first thing they see). This is hardly explained by the "monster neighbors shock" effect. If you agree with this observation, how would you explain it?