It's interesting comment coming from the moderator. I know what you mean, but it is "Hacker News" after all. That's why when sometimes people see irrelevant posts they say "why the hell is this on the front page of HN?". The reason I said "Theme" instead of "Topic" is exactly for the same reason. I think the theme of this site is something that would interest people with curiosity (which comes from the "Hacker" theme).