It's incredibly naive.
I didn't like it either, but:
Taking that guy out is entirely in sync with valuing life in general. I'm not a fan of the death penalty, but his mere existence is threatening enough that I would make an exception with no hesitation and not feel bad about it ever.
Harry has taken him out, in the most effective way possible. The existence of the Horcrux network means that the death penalty is not an effective punishment or removal method.
No, but moderating the memory charm is foolishness. He isn't even remotely proficient with that charm. He should either have gotten expert help, or gone for a total wipe.
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 116.
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.)