I mean they cover the mirrors because detecting two way mirrors isnt as simple as putting your finger on it and looking for the reflection. If you look at the

I mean they cover the mirrors because detecting two way mirrors isnt as simple as putting your finger on it and looking for the reflection. If you look at the picture https://www.twowaymirrors.com/wp-content/uploads/2018/07/fingernail-test-comparison-between-standard-mirror-and-acrylic-two-way-mirror.png https://www.twowaymirrors.com/wp-content/uploads/2018/07/fin... You see the difference between glas two way and standard mirror. That was recommended for a long time as a tip for girls to figure out if they have to worry about a cam being behind a mirror. That however is not sufficient, which gets you from trying to detect a cam to taking precautions as if there are cams you just havent found yet.