Or lie detectors. Especially when employed to monitor entire rooms at once.

“Your response during the two-minutes hate did not show wide enough variation in response to scenes of our enemy Oceania and images of Big Brother. Please report for conditioning.”

Sure, it may not be at the government level except at certain agencies, however imagine when this sort of mentality is used to measure corporate culture. Your subconscious responses during your annual reviews and corporate pep rallies may take on a whole new dynamic.