> True, but facial recognition is incredibly convenient. It requires the customer to do no additional work.

I don't see your point. It's an ethical discussion. Is the goal is to maximize your personal convenience or is the goal is to maximize ethics, while still allowing your extreme convenience?

> As a sibling comment notes, this is how general store customer interactions used to be done. The "facial recognition" system in question was the store owner themselves.

I disagree with the statement in general, but rather than dissecting it, I'll point out that the issue is "spying", not the particular action of recognizing your face.