The former exchange may be followed by:
1. The officer reaching for your vehicle, you instinctively reacting to block him, and we have our aggression.
2. The officer asking why not, telling you he is now going to have to throw the book at you and every minor violation that everyone does will now come up (the easiest? Speeding violation for 5 over).
3. The officer coaxes you. You stand your ground in the same manner. You are being bullheaded. Try to convince your fellow man after an encounter like this. Almost certainly you'll be told that you should 'pick your battles'. This will certainly be followed by #2.