Say 5 years ago I would have said: that’s nuts. But more and more these days I’m thinking, yeah having a house with some signal blocking might not be such a bad idea… not really feasible for most people, but you could integrate somewhat in new construction, and certainly you coild foil a room and use EM paint… but would be pretty weird.
Case anyone’s interested, couple of resources on SCIF wall construction:
https://signalsdefense.com/rfoil-frequently-asked-questions/