Doesn’t work. I was in a queue at SXF airport once. Everybody in the queue passed at least 5 whiteboard-sized posters explaining in detail that you need a 1 litre bag and what’s supposed to go in there. Also, what things you need to present at the check. Those same posters lined the walls of the hall. Yet basically every second person acted completely surprised when the security officer asked for their 1 litre bag. It’s as if those people forgot their brain at home and were all on autopilot.