In February 2005, some CSAIL graduate students "Published" a paper on the effect of tinfoil hats on blocking mind control satellites. They measured the attenuation of radio signals as a function of frequency and determined that certain frequencies which are reserved for government use are actually amplified by the tinfoil hats. Clearly the government must have started the tinfoil hat craze so it could more effectively spy on its citizens.

A full account of this experiment can be found here.