At HKIA now and just watched a young chap use a much lower tech device. He hung a red umbrella over the CCTV camera. Effective!
All staff at the airport have disappeared (22.20 local) and pax are hanging around waiting to see if any flights are going. Most check in desks are occupied by sleeping pax. Crews are reporting but it is up to HKIA to open the check in facilities before anything moves.
Still boisterous cheering coming from the various groups of demonstrators. I doubt anything will move for a couple of hours, if at all tonight.