The Tin Foil Hat

Tin foil hats were invented in a fiction story from 1927  The Tissue Culture King by Julian Huxley brother of Aldous Huxley,

Unfortunately for contemporary tin foil hat wearers, a 2005 study by the Massachusetts Institute of Technology found that the metal hats actually amplify certain radio frequencies instead of blocking them. 

The True Origin Of The 'Tin Foil Hat' And Why It's The Stupidest Thing To Wear If You're Paranoid About The Government