Whatever the 'musical' talents of the passengers, if enough pot had been smoked they would have been unable to realise just how silly they were being whilst within a small aluminium tube whizzing through the sky 10miles above the earth. I suppose that like alcohol, Rx etc once someone's gone too far, it's too late to reason and if it's a group, forget it. I wonder if the pilots radioed ahead for police intervention when landed, or did they decide for commercial reasons to let it slide ?