My point precisely. A universal trace would result in people in the Ministry, not all of whom are reliably corrupt, being aware whenever Lucius's minions used illegal magic.
A trace that was universal except for Lucius and his minions would be a strategic masterstroke, but would probably lead to outright rebellion if it were discovered, and it seems that Lucius doesn't quite have that much influence, or the wizarding world would already have blood purism codified in law.
It's already true that Draco practiced magic underage and wasn't arrested. Whether that is because the trace doesn't apply to him or because the people who see the results of the trace ignore them is open to doubt...
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 90. The previous thread has passed 750 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.
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: