Every time I go to an event there my wife brings her camera and there's never a problem.
Metlife posted on their site the FAQ for the upcoming BTS shows. And as I too am attending on the 19th I took a read :) in their exact words on the camera policy it reads, "No still or video cameras will be permitted into these concerts." So you cannot take a camera. Besides, BTS themselves do not like it when people use cameras.
No, it specifically says no video or audio cameras allowed
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