Don't forget- the district assembly is a brainwashing session that has been carefully orchestrated and practiced for maximum effect. With all of the thought that goes into these programs its actually surprising how many people are tuned out and cynical.
As for seeing a chink in the armor- don't look for it after 3 days of active brainwashing. Look for it after a significant period of dissonance- a personal, logical decision that is not allowed, etc.