Nothing wrong with that. But it's probably some chav-on-benefits, so where they're going to get the money is a question.
This constant issue of disruptive passengers (think Finnish Member of Parliament Tomi Immonen, pissed and aggressive and dragged off a Finnair flight to Bangkok by the Police) could be knocked on the head if 'iffy-looking' passengers were denied boarding, and all passengers were made to blow into a breathalyser at the gate.
You're 13 kilometres up there, a long way from the ground, and you have some cretin having a wobbly on board? Another thing is the trolley-dollies should have a syringe to inject unruly passengers with something to make them unconscious up to disembarkation time.