If they were truly intended on rooting out this kind of behaviour, a few actions would have it stopped by tomorrow. They could start by breathalysing every single passenger, and if they blow more than x% they're off-loaded. Likewise, they could ban the sale and consumption of alcohol onboard; duty free bought onboard could be delivered at the very end of the trip, and passengers would not be allowed to bring any alcohol onboard they purchased on the ground.
The airline involved here do much of what you have suggested. There isn’t time to breathalyse every single passenger, but facilities are available and have been used to breathalyse people suspected of being inebriated and they have been then prevented from flying. Sales of alcohol are restricted to a set time of the day, still early mind, and are monitored and restricted by the Cabin Crew (or should be, they are taught to do so). The airline has also been instrumental in some airports sealing duty free sales in tamper proof bags to try to eliminate people drinking this, not a perfect solution, but every little helps. It would be down to the airport to instigate a delivery service to the aeroplane like in the US, and there seems to be a reluctance to go down that route.
The airline involved here also prosecutes these imbeciles, and delivers the bill to them for the expense incurred. I’m sure this lady (if you can call her that) will end up in prison after this event, she won’t be the first that this airline has pursued and seen sentenced
