I distrust the microphone more than I do the camera. They can gather a LOT more information using the microphone. When I got my computer, I opened it up and physically disconnected both the camera and microphone. Now, when I need to be on a video conference, I use a webcam to plug in to my USB. Otherwise, all that is off by physical impossibility.
I read somewhere that these sites were intentionally positioned near population centers so that an attack on these nuclear facilities would also create a greater disaster.