Whilst I do not condone that sort of behaviour, the attitude of some of these security people leaves a lot to be desired.
Its like they believe they have to be rude and over baring in order to accomplish there job. More like prison warders than people employed to deal with the general public. \
While I am on the subject of rude people at Darwin airport it doesn't finish at security, DIA, whatever their title is now, (ex safety officers) are no better. WE PAY YOU FOR THE SERVICE NOT VICE VERSA.