Isn't the biggest mobile use case where you don't want to be secretly recorded in public? This was a big concern with the original Google Glass.
The idea of being constantly monitored by a megacorp tracking all my movements wih their swarm of cameras to feed us personalized ads is utterly dystopian indeed.
But I think the only valid way yo prevent this will be legislation though, it's not a fight individuals can win on their own.
If I want to record you, you'd never know.
https://www.dpreview.com/news/4272574802/omnivision-has-crea...
So all the people blathering about camera in public have a moot point. All the whining does is prevent the fairly obvious camera being put into devices.
But if someone wants to record you in public otherwise, they will and there's nothing you or any of us can do about it.
Massive problem in Japan where the issue of sex pests and covert recordings comes up every other day in the media. I suspect it's one of the reasons why Japan isn't on the list of supported countries for the Meta glasses. I hope it stays that way.