I am confused as to why Quirrell/Voldemort would leave behind the false clue of the animagi potion. Revealing an escape mechanism that may prove usefull later doesn't make sense.
So now Amelia Bones changed the rules of visitation at Azkaban to prevent forming a new animagus. However, the prison is still vulnerable to an unregistered Animagus from escaping (unless they have detection methods?). Escape like this would still lead to a Sirius style manhunt unless a realistic corpse was left behind.
Interestingly, Sirius whom in this fiction is probably already escaped (how he did it un-noticed is beyond me) may have free run of Hogwarts. Per cannon, Pettigrew in animus form was not warded from Hogwarts proper. I wonder if Sirius's presence within the castle was the glitch Fred and George noted on the Marauder's Map in chapter 25. They noted two glitches, one intermittent and one permanent. Pettigrew's whereabouts if still indeterminant as well since he didn't hid in plain sight as Scabber in this fiction (perhaps his death wasn't faked this time).
Interestingly, Sirius whom in this fiction is probably already escaped (how he did it un-noticed is beyond me) may have free run of Hogwarts.
It's possible they were tricked in believing they had ever captured him in the first place.
Update: Discussion has moved on to a new thread.
The load more comments links are getting annoying (at least if you're not logged in), so it's time for a new Harry Potter and the Methods of Rationality discussion thread. We're also approaching the traditional 500-comment mark, but I think that hidden comments provide more appropriate joints to carve these threads at. So as of chapter 67, this is the place to share your thoughts about Eliezer Yudkowsky's Harry Potter fanfic.
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. The fanfiction.net author page is the central author-controlled HPMOR clearinghouse with links to the RSS feed, pdf version, TV Tropes pages, fan art, and more, and AdeleneDawner has kept an archive of Author's Notes.
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: