Camera and microphone on the mobile phone activate when I press the button to activate them. Furthermore, the photos and sound are ostensibly owned by me. Pics go to icloud, voice goes to the people I talk to. Not to a corporation that built a global web specifically designed to suck up every bit of personal information that they can possibly suck. "To provide me a better service", haha.
Mics and cams are OK in cars, because the car is not connected to the Internet. The data stays in the car. Baby monitors are OK, because they are not connected to the Internet. The data stays in the house. Notice a pattern there?