if you encourage passengers to drink for a couple of hours before boarding what do you expect?
Cut check-in times and return airports to places to fly from rather than shop and drink in.................
Worst lot I ever saw was an icelandair flight at Schipol - security had fenced the whole flight in around one bar and everyone over the age of 14 was flinging it down like lunatics. the security guy told me "they're allways like this - no trouble but completely out of their minds by the time the plane leaves..........."