Actually, HN has captchas built in: they are the first comments a user makes. So here's a simple captcha idea: judge a first-time user on the pertinence of the

Actually, HN has captchas built in: they are the first comments a user makes. So here's a simple captcha idea: judge a first-time user on the pertinence of their first comment to a thread. Just like show-dead, only users who browse with show-newbies enabled would see those comments (in green). No downvotes? Welcome to the community