BAD IDEA
Can smart glasses record people without them knowing?
Yes, smart glasses can record without others noticing, but turning spy mode on might land you in hot legal water.
Smart glasses equipped with cameras can record video and audio discreetly enough that people around you might not notice. However, secretly recording others often violates privacy laws depending on your location, so using this feature to spy on people is a legal bad idea. If you're considering it, maybe rethink your life choices instead.