The problem here, as rightly pointed on most posts, is the immaturity of the crew, the lack of responsible individuals to act on behalf of EY at every stage of the process.
Whether pilots fill reports or not, whoever is on the receiving end of the R/T requesting for police assistance should inform the corporate authority of such cases and in any respectable airline they decide on behalf of the organisation what action to take.
This incident shows again how poorly managed EY is, by letting abu dhabi only too happy police force take action against these passengers, they have allowed another entity to manage their image and
PR, a nono in Marketing.
EY will not be hearing the end of this and might as well close their route to SYD, the flack is coming and it is going to be hard and thick.