In my humble(ish) opinion, the alcohol problem will always occur, be it on land sea or air. If the personality beneath the outward show has antisocial tendencies, then alcohol is the stuff to bring them out. Most of us have seen good and respected mates become total strangers after one too many.
The legal system is now reacting by imposing serious penalties for this behaviour on aircraft, and that is as it should be. Unfortunately, the next homicidal air-rager doesn't even know that it will be him. It will be an otherwise normal person whose deep rooted problems are unearthed by booze. He is the one who might kill any of us!