Have you ever been driving on a highway when a police officer works his way into your little pod of traffic? Everyone slows down, afraid that they will be nabbed for doing exactly what they were doing when the officer was out of their eye sight (but not radar range, mind you).
Does the same thing happen when your boss walks into a meeting?
Both the officer and your boss are omnipresent. They both know you are repressing your instincts because of their presence. And most importantly, they both have the ability to hand you a little pink slip of paper that could cost you a lot of money.
Civil disobedience is a right, so bend (or break) a law or two under the watchful eye of the man. James Dean would do it.