Remember, the airline crew won’t have any issues detaining you from disobeying the laws. They may become irrational and demand to search your phone. And unfortunately, they don’t need a warrant to do so when you are 39 000 feet in the air with no legal aide by your side. We recommend you give in and delete the pictures. Also, consider writing to the airline authorities about this incident. Speak to them about the rude behavior of the crew members and clarify your motive for taking pictures.