And the best experiment to prove it, is this one. Nobody seems to care about all the cameras,sensors, tracking.
Some even encourage it in the name of "Safety".
But show them the camera and they freak out.
"Surveillance Camera Man": https://youtu.be/mP5ZVPwP7bg
Edit: It seems the link above has now been made private but that was not the case for many years. I will keep the comment as above for the sake of historical accuracy. More details here: