Agreed, old news. Also think about apartment buildings with coax https://ieeexplore.ieee.org/document/6083650 https://ieeexplore.ieee.org/document/6083650 "Hum

Agreed, old news. Also think about apartment buildings with coax https://ieeexplore.ieee.org/document/6083650 https://ieeexplore.ieee.org/document/6083650 "Human intruder detection with Leaky Coaxial cables for wide area surveillance system" 2011 https://en.wikipedia.org/wiki/Time-domain_reflectometer https://en.wikipedia.org/wiki/Time-domain_reflectometer Paranoid memes below https://www.youtube.com/watch?v=Kr7AONv3FSg https://www.youtube.com/watch?v=Kr7AONv3FSg https://www.youtube.com/watch?v=aPMULk7AhWw https://www.youtube.com/watch?v=aPMULk7AhWw