Cameras, Cameras, Cameras...

[M. Sage]

They tested those on Mythbusters and they didn't work.

 

[thorkyl]

That is why I drive a 20 year old smoke blowing diesel.
No chip, no computer, heavy iron, with the amount of steel in it
I do not need my tin foil hat while driving.

As for hiding your plate...
Not much you can do for that.