Many reasons: users flagging, moderators manually removing from front page are the most common. I guess it's pretty normal given how HN works (anyone with a cer

Many reasons: users flagging, moderators manually removing from front page are the most common. I guess it's pretty normal given how HN works (anyone with a certain number of points can flag + active moderation), but I just find those "rejected" threads quite interesting, especially their comments section.