Earlier quoted context omitted.
> it can be used against them, too Is it facial recognition that's the problem here, or the policy itself? In theory, they could hand out pictures of everybody who wasn't allowed in to the security staff and use low-tech facial recognition to enforce the same policy - assuming it was scalable, would it be OK then? I remember reading that IBM got into trouble when it first computerized its personnel files because some…
You're right: it's the policy that's bad. However, facial recognition is what makes enforcing that policy possible, and society and the law haven't changed quickly enough to deal with the repercussions. For instance, say 18 year old "Joe" gets caught stealing soda from a fast food place. The manager kicks him out and bans him from the store. Fast forward a decade, when Joe walks back into the store with his wife and…
This is especially worrying when no humans are involved. If your Google account gets banned by some automated bot for whatever reason, you might find any attempts to create new accounts be considered "ban evasion".
Regardless of the fact that you have very few options for things like ad networks or publishing Android applications, even before you consider losing access to your e-mails or any servers you might have.