Liquids in Hand Luggage
One version of the rules I have found says
"The contents of the plastic bag must fit comfortably and the bag sealed. Each passenger may carry only one such bag of liquids. The bag must be presented for examination at the airport security point. Liquids that can not be placed inside the re-sealable bag must be packed into the hold luggage and checked in.
It depends what people think is meant by "Presented for examination at the security point". Many might think that this meant presented in your hand luggage. If they can put up signs saying take of your coat/jacket and videos produced at huge expense then they should show people getting out their plastic bags full of lethal mascara and unguent body lotions and make the requirement clear to people who perhaps only travel once a year.