if wizards were public about their abilities, a higher proportion of wizards (even low-powered wizards) in the muggle population would be identified and trained
There's no such thing as a "low-powered wizard", and all wizards in Britain are automatically detected magically (at birth?)
It is implied that in HPMOR there are - presumably third-world? - countries where they "receive no letters of any kind". So potentially a complete breakdown of the masquerade might allow the least sane Muggle governments to track down and kidnap wizarding children for their own use. (I'm a little confused by this, though, since spontaneous untrained magic should be a serious issue if muggleborns aren't being dealt with.)
New chapter!
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 102.
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.)
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: