Filch's crime, for which Harry wants him to serve jail time, is that he sent Draco & co to the Forbidden Forest, potentially exposing them to assault.
Filch testified that he intentionally wanted to expose them to assault and a chance of dying. Quirrel didn't do anything that gave Draco a chance of dying.
Quirrel on the other hand drinks the unicorn blood to safe it's own life. As far as Harry thinks Qurirrel also only stunned the centaur and wanted to safe Harry's life.
For Harry morality being alive and saving lifes is very important. Short term pain and being stunned doesn't factor much into Harry's utility calculations.
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 99, 100, and 101. The previous thread is at nearly 500 comments.
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. (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.)
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: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27
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: