It uses facial recognition ergo a computer flagged her face as similar to the face of someone known to be banned from the store. This tech is known not to be go

It uses facial recognition ergo a computer flagged her face as similar to the face of someone known to be banned from the store. This tech is known not to be good enough for this use case. If you match a large population of users you are going to get an unacceptable level of false positives. Even putting a human being in the loop is trouble prone because people aren't on average good enough at this. It would be more useful to require a free membership to shop there and validate allowed users via bluetooth and ban users devices and phone numbers.