Keeping it secret to the public makes sense on the other hand keeping it secret to the order of the phoenix is a different matter.
You keep secret without asking from people who are your equal or higher than you in status. If you get asked by someone lower than you to keep something a secret than you at least want to know the secret yourself.
In this setting, there are things you avoid learning even if you're higher status than the secret-keeper. Some secrets are dangerous even to the listener.
I suspect Mrs. Bones includes anything rising from a fragment of Voldemort's torn soul, whether the trick that decapitated dozens or revived an ancient dark lord, in that set. Part of the reason she distrusts Harry is that she believe he's an eleven-year-old struggling with a dark spirit -- which gives him a comparative advantage of knowing what evils needs must be kept under wraps
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 119.
Plans for next chapter release:
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)