I don't think that would be likely to work very well - besides being somewhat impractical, most RF electronics are already covered by metal 'cans' to prevent ex

I don't think that would be likely to work very well - besides being somewhat impractical, most RF electronics are already covered by metal 'cans' to prevent excessive EMI from escaping. You might be able to find the antenna and wrap foil around it, but that just sounds like a recipe for shorting something out once the foil gets unwedged/unstuck. Plus, tin foil hats can actually improve signal reception around the 2.5GHz range used by WiFi :P https://web.archive.org/web/20130126025620/http://berkeley.intel-research.net/arahimi/helmet/ https://web.archive.org/web/20130126025620/http://berkeley.i...