I get that this thread seems to be for fun,
but here is what I know on the idea of tinfoil hats
the entire thing started by air force people flying planes,
they thought that the aliens were controlling them.
sadly they did not get that a metal foil covering the head is not a good faraday cage, and often amplifies signals getting to your brain...
what is used is the same as biology uses, and due to how it is made, a conductor will not stop it at all
for more reading
caduceus3
you have to absorb the signal to get rid of it,
so you want something sort of conductive, and you want it thick.
like wearing a giant resistor on your head.
Stop Alien Abductions
not entirely sure that the guy that wrote that website gets why what he made works.
and of all the personal websites I have watched over the years, it has been there longer than any other.
edit:
been years from when I read his website, but went to look just now,
seems as if he does get why it works now.