Of course y'all know you're silly! Tinfoil? Really?
Anyone that knows anything knows that the tinfoil has been able to be penetrated for quite a few years now. DUH!
For total complete infallible protection, you hafta use a leaded crystal bowl (at least 24%)! The lead in the crystal absorbs any sort of penetrating techniques.
In fact, "THEY" may be only able to 'see' your body (appearing headless of course) when you're being scanned from a distance.