How to Stop Cops From “Seeing Through Walls” to Spy on Your Home! https://www.youtube.com/watch?v=ZfvmdX631Gc
Many years ago my daughter had a neighbor who lined the walls in her house with tin foil. She said it was to keep the government from spying on her. We considered her to be psychotic. I would not come to that conclusion today.
@Hyolobrika
In most people's houses, of course, they wouldn't have to bother as people bug their own houses on the government's behalf.