Altworld Alert! Aluminum Beanies are Government Trick!
A study by MIT engineers has proven that while aluminum beanies do attenuate certain radio signals, they actually enhance those reserved for use by the Governement. You heard it here first folks, aluminum beanies must have been designed by the government specifically to aid in their radio brainwashing of unsuspecting alternauts!
No studies have yet confirmed or denied the efficacy of the common tinfoil helmet, however, so there is hope yet.