I have seen a Middle Eastern man at the Newark airport open his jacket and use a video camera to scan the airport and then hide it back under his jacket.
I notified a policeman who was nearby and was given such a look of contempt and derision plus a short lecture. Apparently, it is a normal thing for Middle Easterners to secretly videotape secure parts of the Newark airport and shame on me.
Maybe now would be a good time to start profiling.