What the people that develop these tools don’t tell the politicians that will buy them is they are easy to defeat. Just as a tank can be defeated with a Molotov Cocktail, if you know what you are doing very simple and readily available materials can defeat multi-million dollar surveillance equipment.
In this particular instance what the developers probably aren’t telling the potential buyers is that there is something called the Skin Effect. This is, in essence, a law of physics that says the higher the frequency of an electromagnetic wave the shallower the penetration of that wave through a conductor. It depends on the resistivity and magnetic permeability of the conductor but for copper a 1 Terahertz wave will have a skin depth of about 66 nm. The typical aluminum foil you buy at the grocery store has a thickness of 200 um which is over 3000 times thicker. I don’t have the skin depth numbers for aluminum but I can tell you that lining your jacket with aluminum foil will make your jacket completely opaque to such machines. Even aluminized mylar balloons or “space blankets” will be opaque. Hence, these machines will not be able to see anything on the other side of the metal lined clothing. I expect even sequined purses and dresses will be opaque.