Then Standalone charge them for their 'unruly' (I think that is the word you are looking for) behaviour, and don't cloud the issue and create a huge amount of bad publicity by charging them with drinking alcohol without a permit, or charging them with illicit drug taking. The rest of the world would charge you just as the UAE have done for the the behavioural issues but certainly not for drinking and taking of a sedative, and that is the issue here, and the worry for other non-muslims contemplating travelling with Etihad to Europe.