I've found a stock of tin-foil hats to be a valuable staple in my inventory. I've had all sorts of whacko's - nothing a good tinfoil hat won't cure. Just tell 'em it works wonders at keeping the radio signals/outer space rays out. I got the idea when I saw a whacko woman put tin-foil on her windows. When I asked about it she told me very matter of factly - "it keeps the rays out". I figured if it worked for her, it could work for others. I've not had any complaints - yet.

Of course - down by you they're "crazy" - where I worked it was "eccentric"...