According to a study from MIT, Tin Foil Hats actually increase the ability of mind control rays to work. So...who encouraged everybody to use them????
From National Business Review:
Engineers at the Massachussetts Institute of Technology have published results showing that tinfoil helmets, prized in many circles for an assumed capacity to resist mind control rays from aliens and governments, may actually amplify the controlling signals.
from the abstract:
Using a $250,000 network analyser, we find that although on average all helmets attenuate invasive radio frequencies in either directions (either emanating from an outside source, or emanating from the cranium of the subject), certain frequencies are in fact greatly amplified. These amplified frequencies coincide with radio bands reserved for government use according to the Federal Communication Commission (FCC). Statistical evidence suggests the use of helmets may in fact enhance the government's invasive abilities. We theorize that the government may in fact have started the helmet craze for this reason.