[kazinator]

If you're seriously worried about this issue/threat, you have to take into consideration non-Wi-Fi cameras also! Not to mention microphones.

[brownbat]

Agreed, this is a pretty narrow slice. Though if you're seriously worried about all forms of surveillance, you can end up heading down a deep rabbit hole pretty fast.

Consider "The Thing:" https://en.wikipedia.org/wiki/The_Thing_(listening_device)