Seriously, who needs to record someone without the knowledge of the person being recorded? That’s a big red flag, a perverted character, there’s no other explanation. Creepy Mark Zuckerberg allowed other creepy characters to share personal moments with him.
Back when wearables were new, I contemplated getting one for face recognition. Not for creepy reasons, but because I am “faceblind”, and recognizing people I should know and getting a name for them would be extremely helpful.
And no, I would not use meta glasses for that, first, because they from Zuck, and second, because the control of this are out of my hand. The system I wanted back then only had local processing, and no data hoarding.