When you think about it, the notion of selling alcohol in an airport is bizarre. Why would you encourage people to drink before they board a plane, and the effect of alcohol is increased in a pressurised cabin?
Simple - the bars are owned by the airports, it's the airline staff who receive the consequences.
So, as an airport owner, you have a built-in customer base ready and waiting - passengers have to check in two or three hours before they fly, they have hours to hang around, they get bored - they will drink to pass the time - result!
Then the get on planes, the alcohol kicks in, they can buy more, but for those predisposed to bad behaviour, constriction of movement and space, more boredom, and alcohol levels increasing as the air thins, is a recipe for bad behaviour.
As more people travel, more drunken people travel, it's not rocket science.
The answers? Let the airlines prosecute the airport for endangering their flights, give breathalysers to check in staff, advertise all over the bar areas that anyone who APPEARS intoxicated will be refused boarding, bags off, no compo, and let the airlines insist that all airport bars are closed, which will take a little time, but can be done.
There is absolutely no earthly reason why traveling by air and drinking alcohol are connected, except the motive of profit, at the expense of the comfort and safety of the majority. If you seriously need alcohol in order to fly, then don't fly - again, it's not a right.
Stop the nonsensical and unsocial notion that you are 'starting your holiday' - make people behave like the adults they are supposed to be, and everyone can fly safely and with no air-rages.