I would guess the big clue why they would drop it so much would be a guy with a camera, a guy with a boom mike, a so called runner and a person directing them to point at this or that.
it's also like the recent programs where a group of people evade being captured or the celebrity SAS guy evading the Indonesian police, big clue there's at least another person holding a camera to get the big shot drama, in the Indonesian one, the SAS guy crept about, but all the police had to do was follow the trail left by the camera man - doh