This has never been difficult to achieve, why is this a big deal? Privacy never existed in the first place. People have been able to eavesdrop on homes by targeting pretty much anything containing metal coils (including appliances) with advanced HAM radio equipment since the early 1970s. We need to stop pretending there is such a thing as privacy and start actually looking at where scientific progress is at right now. If you actually get a basic grasp of physics, radio theory and electrical engineering you're going to find out exactly how little privacy we have.