I'm curious about how one would go about spy-proofing one's house.. I suppose the 1st few steps would be to make each room a Faraday cage... What kind of sheet metal would be good to use for this? Would somet thin metal suffice? In terms of isolating the windows from ir-laser pickups, I thought I could attach speakers to every window and tune them to some radio station that doesn't exist, or better yet a RNG so that audio-substraction wouldn't work. (One of the ways of spying is to bounce a laser off a window. The vibrations from the window would cause vibrations in the reflection of the laser beam, so the spy can listen in on your conversation. However if there's a lot of noise outside your house, they would simply hang a mike aimed at the source of the noise and substract the two signals to filter out everything but what they're trying to spy on...) Another thing I've heard is some stuff about the US Embasy refusing to move into a building that was full of bugs in the now defunct USSR, and one of the reasons is that they were detecting lots of micro-wave-emmisions. The article stated that this was a health risk, but someone on here(???) stated that microwaves can be used in place of bouncing an ir-laser beam off a window because any metal objects in the target room would also vibrate with sounds... So as a summary, I would make the room a faraday cage with speakers on it every few feet fed into individual RNG's, then use some of that sound isolation foam all around the metal slabs, then set up the dry wall/floor/ceilings on top of all that... Of course phone taps are still a problem, but hopefully with the PGP-phones.... Have I forgotten anything?