According to reports, facial recognition software was being used to track down the singers' stalkers without their knowledge.
The disclosure came from Oak View Group's Chief Security Officer Mike Downing, who was invited to the event by the kiosk's manufacturing company, the outlet said.
As their faces were scanned, they were put through a database and cross-referenced against images of hundreds of Taylor's known stalkers.
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That was in line with the Saudi minister's preference for a moderate reduction that wouldn't "shock the market". Those countries, along with Nigeria, were opposed to participating in a supply reduction, the delegate said.
Swift has had a number of issues with insane fans trying to track her down.
Concerts are technically private events, and organizers are allowed to surveil attendees as they see fit without notifying them, The Guardian notes.
The Guardian has contacted Swift's representatives for comment.
A second man, Julius Alexander Sandrock, was also arrested in April for trying to gain entry to her home.
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Will Alisson's save prove to be as pivotal as Gerrard's goal? Big chances, a lot of pressure, a lot of great moments. Sure, the shot was right at him but that was because Alisson rushed off his line and read the situation perfectly.
Reputation, the singer's final studio album with Big Machine Records, was a record breaker for the singer-songwriter and marked her comeback after almost a full year off following hard-hitting tabloid headlines. In September, Swift sought a restraining order against another fan who had sent death threats. Bosses at Ticketmaster are also considering using facial recognition technology at concerts, but say they will be "careful" about its implementation due to privacy concerns.
In April, one of the star's stalkers was found sleeping by police at her home in NY after reports of a break-in.
That same day it emerged fans at the show had the pictures taken with facial recognition technology in a bid to weed out stalkers.
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Cohen's father, Maurice Cohen, who showed little emotion during the hearing, later told reporters: "My heart is ripped". Cohen pledges to help in further investigations that is not something the court can consider now", the judge added.