PG already responded in the post. (He got downvoted heavily so his post is muted): As we say in the guidelines, http://ycombinator.com/newsguidelines.html HN is a news site, not a forum for people with issues with companies we've funded (even when concealed as Ask HNs). So I'm killing this. If you have an issue with Dr Chrono, please contact them directly. If you ask me, there wasn't anything wrong with the question.…
It's obvious that HN is not a news site, but a discussion forum based upon censored news. If this complaint had been about a non-YC funded company, the moderators would have left the story up. Heck, every other story on HN is usually about somebody complaining about a company's product or conduct.
Why is YC afraid of open discussion? So what if one company out of the portfolio is having problems? Nobody expects the investments to be perfect, yet killing the conversation makes it look far worse, as though there is something to hide.
End of the day, profit trumps transparency. Remember that the next time people get on the soap box and talk about internet freedom blah blah blah.