While not as precise, you can definitively leak your location by scanning for the surrounding cell towers, especially in a city, which usually have hundreds or thousands of them (Manhattan alone has eleven, for example). I used to run a Python script on my Nokia phone that logged the tower ID, and I could reliable tell when I got to work, home, etc.

And that's just for people who control your phone. Your operator has U-TDOA¹, which is typically accurate to 50m.

The camera part is true, but tape is cheap :)

¹ https://en.wikipedia.org/wiki/U-TDOA

What's your threat model? https://ssd.eff.org/en/module/introduction-threat-modeling

For most people mass surveillance is a more realistic threat than the NSA hacking their camera.