Genuine question, what could the FBI actually do?
I understand that the United States is actually a puppet for Israel, although the name on a Bluetooth device isn't really breaking any laws? It's not calling harm to someone, its not a threat. I thought America was the place of free speech?
Passengers are required to follow orders by flight crew regarding flight safety. If the passenger shut off the device, it does appear that 1st Amendment speech protections would apply (prior restraint is expressly forbidden). If the passenger failed to comply, then I suppose the FBI could detain them for failing to follow the lawful order.