Bye-Bye concentrated milk and vodka

I was reading in The Economist that non-Europeans who take the plane and have to make connections inside the European Union are upset because they are not aware of the new retsrictions that apply to liquids.
"The Russians get so angry that they drink a bottle of vodka on the spot," said Edgar Engert, spokesman for Munich's airport operator.
It's not only about non-Europeans. While I was packing for my last flight back to Montreal, my mum placed a huge tube of concentrated milk in my backpack. We had been careful to put the wine, cheese and other treats in my suitcase but in a moment of absence none of us realized that the milk would not end up in my belly, but in an aiport's garbage. Or in a security officer's belly, I'll never know. I'm still drooling over the thought of the tube.
As for the restrictions, nobody knows if they actually helped reduce the risks of a terrorist attack, no study has been done on the subject so far. And sales in duty-free shops have fallen by 40%, still according to the article.