Unfortunatley you could carry an entire library on the subject with you, but it will not make one iota (,--Spelling ?) of difference.

1 :- If you are challenged by a person of authority (police) they will still insist that you follow their directions, of which you don't have a lot of choice.

2:-If hassled by others (esp security gaurds that are full of themselves) they will be too ignorant to understand and appreciate the information you have and continue to hassle you.

You would really need to ask yourself if the shot is worth confrontation/aggrevation and then the possible escalation to having the police called whereby which you are back at point 1 and lose anyway ??