Would you want to go to a movie theatre where audience engagement is recorded by a hidden, undisclosed camera? Would you prefer that? People are right to have instinctual suspicion of being covertly spied upon en masse in public spaces.

If I'm walking around, say, the Grand Canyon, you know, up top looking down. If someone is walking around filming a travel vlog and I happen to get filmed, ok, so what? Right? But if they run up and shove the camera in my face without asking for permission, that becomes rude and I should absolutely have some say in it.

If I'm in an airline, I should have some say if there's going to be a camera facing me the ... entire ... flight. That goes beyond just the casual picture or video capture.

"To continue watching your in-flight movie, please watch this ad, note looking away from the screen will pause the ad while we wait for your gaze to return."

That is an entirely realistic scenario, patents have been granted for this already. Regardless of an expectation of privacy it is potentially a terrible UX as well.

I'm paying lots of money to be there. It seems like it's in an airline's best interests to not piss off customers by secretly filming them (or even appearing to have the capability to do so), given how creepy it seems to many people.

Unlike "completely public spaces", it's not free to be on an airplane. You can vote with your wallet in this situation.

I think the people who disagree with this reply should explain their reasoning.

You're in public on an aircraft, you have no reasonable expectation of privacy. The people around you, including the airline's staff, can listen to your conversations/see you.

I'm not even arguing legally, even just in terms of common sense, everything you do or say is isn't private in those circumstances. So a camera being there (regardless of if it is used) isn't moving the needle either direction.

An airplane isn't really public space like the street, since you can't just waltz into an airplane free of charge, and airplanes are not generally owned directly by the public. They are managed places open to the public for a price, and that payment comes with certain expectations (e.g., there wasn't a camera present 20 years ago, why should it be present now?)

There's a difference between "one person saw me pick my nose in the aeroplane" and "me picking my nose was recorded for all time, later published and made available to the entire World".

What definition of "completely public" are you using that would include a privately-owned airplane that I spent $100+ to board after going through a security checkpoint?

Imagine if cameras could read your retinas and identify you like in Minority Report (https://www.youtube.com/watch?v=7bXJ_obaiYQ). Though we're not there yet, facial recognition tech is almost ready for something similar.

No, the burden is on you. How can you have a concern with people not being spied on in public?