(The HPMOR discussion thread after this one is here.)
This is a new thread to discuss Eliezer Yudkowsky's Harry Potter and the Methods of Rationality and anything related to it. There haven't been any chapters recently, but it looks like there are a bunch in the pipeline and the old thread is nearing 700 comments. The latest chapter as of 7th March 2012 is Ch. 77.
There is now 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.
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: one, two, three, four, five, six, seven, eight, nine.
As a reminder, it's often useful to start your comment by indicating which chapter you are commenting on.
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:
You do not need to rot13 anything about HP:MoR or the original Harry Potter series unless you are posting insider information from Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).
If there is evidence for X in MOR and/or canon then it's fine to post about X without rot13, even if you also have heard privately from Eliezer that X is true. But you should not post that "Eliezer said X is true" unless you use rot13.
I quite doubt Lucius is upset with Harry at the moment. He's not stupid, and Harry is not to blame for what happened to his son.
And I'm quite confident Quirrell is not H&C, as the Defense Professor would have been considerably better at brain-washing Hermione. Besides, Harry will know that Hermione truly going dark is far more unlikely than interference via mind-magic or blackmail. He is going to stay on her side and investigate what happened, and Quirrell would anticipate this and not expect Harry to fall into darkness.
He would not have been considerably better at brain-washing Hermione. Others, yes, but not Hermione. Quirrell is Voldemort, the ultimate evil (that we know of). Dumbledore has said that "Evil is that which does not love, and cannot know love without ceasing to be evil," or similar.
Quirrell has already tried to convince Harry that Hermione is making a show of goodness to further her own ends. If he really believes that to some extent, given that he's the ultimate evil, he would have a hard time modeling Hermione's thought process well enough to get it right on the first try.