Well, laptops. But we never heard of prism before now, which doesn't make it not a thing.

I'm completely building this into a paranoid delusion, but then this whole thread is a demonstration that we lack / are denied the knowledge to dispel paranoid delusions, and sometimes they're right.

Indeed. But it happens rarely enough that its usefulness to video chat with friends outweighs the risks for me and many other people. Most people are already okay with a camera on a device that is constantly pointing at them.

I do not have that option with my Macbook, nor do I think people have such an option with most laptops that have an integrated camera and mic. I could physically cover the lens and mic, but you can do that with a Kinect, too.