Sorry, it isn't clear from the quoted article, but did the incident happen after landing or in flight? Was she sober when she boarded and served so much alcohol that she became drunk during the flight; or did she drink her duty free?
Behaviour such as this is unacceptable in any environment, but how did she get to be drunk? I know that way, way back in the sands of time an airline I worked for had to reduce the amount of alcohol on board its flights coming out of a dry North African state because the crew were unhappy (felt unsafe?) telling passengers they couldn't drink any more, but it was easier to say 'sorry sir/madam the bar is empty'.