Gangtok, June 1 -- India's aviation regulator has drawn a hard line on terminal filming, and the worst offenders could lose the right to fly altogether.

Pull out your phone for that perfect travel reel at the airport, and you might just film your way onto India's No-Fly List. That is the blunt warning behind sweeping new rules from the Directorate General of Civil Aviation, known as the DGCA rules and regulations. The regulator has clamped down hard on unauthorised photography and videography across sensitive zones at airports nationwide, Delhi included.

The reasoning is simple. Security. Even a casual clip can quietly expose things it should not. Under the revised guidelines, passengers and visitors cannot shoot photos or videos in res...