License plate blocker!?

Hey guys,

I know im going to get stuff from just about everyone on this website but im hoping that there is at least 1 person here a little crazier than I am. This is my thought. I want to have somthing to go over my plate at the push of a button or somthing to that effect. I am aware that it is highly illegal to do that but if im riding through bumper to bumper traffic and dont want to get caught, i want to be able to have this option. Has anyone thought of this? I looked online and found alot of photo blockers but i dont want that. I want a full proof shield that blocks all light (such as a metal shield). My thoughts are to glue magnets on the back of the plate, apply hinges some how and have a flip down door or somthing and it will fasten when hitting the magnets. Also was thinking of an instant black out button. If a cover can become jet black in an instant so that nothing can be seen through it. I cant think of how to complete these ideas or how to rig it. If anyone has any crazy ideas please fill me in. and i know most of you are thinking if you wanna do stuff like that, why not just take off the plate? This is because i dont want to get pulled over for no plate, only to have the plate blocked when needed.