That assumes you can unplug it. Most devices I own have the camera built right into the device, and it can sometimes be hard to find an option that doesn't include it. I have a Webcam cover on my desktop and laptop.
I haven't seen one that would work for my phone, but if someone has hacked my phone, I probably have bigger issues.
The transition from analog to digital really hurt my desire to watch OTA TV (you caught me! I'm not under 25).
With analog broadcast, any weak signal or interference produced a little bit of static, but you could still see and hear what was being said. With digital, any weak signal means dropped frames and silence or weird glitches. You completely lose what's happening. Even with a powered antenna, I have frequent issues with weak signal. I could probably try to get a rooftop antenna installed, but there's no guarantee it would be any better. It's just easier to find other entertainment at this point.