Although anecdotes don't amount to evidence, some air-rage occurrences have been linked to excessive drinking:
On April 19, a United Airlines flight from San Francisco to Shanghai diverted to Anchorage after 22-year-old American twins Cynthia and Crystal Mikula began fighting. When crew members tried to break up the drunken altercation, the sisters, who were en route to a modeling competition, reportedly spat on, punched and choked several crew members. Both sisters are expected to plead guilty and are awaiting a September sentencing.On July 4, 2000, a Continental Airlines passenger flying from Anchorage to Seattle bit a flight attendant on the arm, threw a full can of beer at another and forced the crew to turn the plane around. The passenger was sentenced to four months in jail and was ordered to pay Continental more than $3,000.Then there's the 1995 case involving the Connecticut-based investment banker who had too much to drink on his United Airlines flight between Buenos Aires and New York. He became abusive to a flight attendant when he was denied more wine and reportedly defecated on a food service cart. He was fined $5,000 and given two years' probation.
Source: Washington Post