I'd prefer all this stuff came with physical switches so it can be enabled/disabled in a hack-proof manner.
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 :)
It's also not accurate to within enough resolution start targeting advertising and other nuisance information at me even if there was a way to present me that (which there isn't).
I'm well aware of the power of triangulation, I used to go fox hunting.
That's really quite a way from "hundreds or thousands".
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.
I don't have any illusions about being able to stay private from the eyes of nation state level adversaries but commercial entities can still be kept out if you try.
