I do not board a plane to be discreetly recorded by a pair of glasses. It's creepy and just privacy invasive.
That's not what's under debate though.
>British Airways Warns Filming Crew With Meta Smart Glasses Could Get Your Tickets Cancelled
>The reported change builds on restrictions introduced earlier this year against photographing or filming BA employees without their consent. Livestreaming employees without permission is also prohibited.
>>“This includes filming, live streaming or taking photographs of any BA crew or other colleagues without their consent.”
Emphasis mine.
If they're doing this to protect their passengers privacy, they're doing a really good job at hiding that.
See the quotes in my other comment. It's pretty clear it's not about being "secretly" recorded.