There's a lot you can get away with by making a process complex, arduous, and potentially expensive. Faced with that option vs letting some employer take photos of you in your pajamas without shaving while watching your every move, people tend to forego privacy.

When the working population at large starts to follow suit, you've artificially introduced a new trend with artificial social acceptance. Now, it makes a single employee battle concerned about privacy even more daunting and introduces perception of increased risk of failure if legally pursued for the employee thinking of litigating.

The end result is: privacy is eroded. Rinse repeat, for just about anything you want to change. Just make change gradual and give it time. It then takes someone with the financial and time resources to take a hit and pursue as well as eagerness to bother.

https://en.wikipedia.org/wiki/AT%26T_Mobility_LLC_v._Concepc...

Just because I own a microphone and camera doesn't mean I can use it unknowingly in your home. Even if you were to borrow it and willfully bring that camera and microphone into your home, there are reasonable expectations of privacy that can't be violated.

If I explicitly said I'll be using that microphone and camera to record you, made that very clear, and had you sign off on it without duress, then there may be grounds. The problem is, as a condition of employment, at least for me, would be a form of duress. If it becomes widespread and everyone caves into signing off on that sort of recording, then itll start to lose strength as being a form of pressure.