While the fans were staring at the screens, they were filmed, their faces were recognized with facial recognition technology and with facial recognition cameras and they were cross-referenced with hundreds of Taylor Swift’s “known stalkers.”
You don’t have to know Taylor Swift’s songs to know that she is an (at least self-declared) advocate of women and LGBTQ rights and that she supported a Democratic candidate during the last US mid-term elections.
That, and probably also the mere fact that she is a (well-known) woman, have made the singer of “Safe & Sound” a beloved target of fake news, trolling actions, public attacks and severe threats of persons who deem such actions a suitable way to express their “disagreement” with or their “love” for her.
Among these “fans and haters” are reportedly hundreds of persistent stalkers against who Taylor Swift wishes to protect herself by using FRT, without the persons being scanned knowing this.
It will (or should) not go that fast, however, as using FRT is considered processing biometric data under the General Data Protection Regulation (“GDPR”), “biometric data” is considered as sensitive data and its processing is subject to strict conditions, in addition to the other (general) conditions that must be met for each processing of personal data.
This is because biometric data such as a face scan could possibly be used to identify a person in a lot of different situations, allowing the owner of such scan to get insights into the private life of the concerned person, to a much further extent as that person may anticipate.