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.

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.