I wouldn't be surprised if rumored 720 AUGS* was incubated and tested on 360 during anti pirate raids.
Last November MS released silent update that made some pirate games unplayable. Apparently every console/game has some unique identifier,consoles that failed the test were flagged for banning,games made unbootable.Pirates managed to defeat that with various firmware updates,but the war is still going.
Update was silent,some small file was updated,no consent was needed and you were fucked weather you had the disc inside or not,one connection to live...boom,games unplayable offline or online
*anti used games system