On Monday around 5pm there was an usual military type shouting, yes shouting, get all your jackets off, boots off, belts off, ipads out, liquids out whilst waiting and not when you get to the front. He then shouted next, next, next to the tray conveyor. Was very efficient albeit a little startling to some Japanese tourists. Id say around 60% had not made any effort in queue prior to the announcements. One wonders why.
It can be done efficiently, although a little sympathy for those who don't speak native English.