Why do airlines sometimes play “chicken” with the SYD curfew?

[anat0l]

Another fine example of a waste of the paper its printed on, or my download allowance:

Dawn brings rude surprise to residents, arriving before 6am airport curfew | The Daily Telegraph

DOZENS of planes are flouting the airport curfew each week, landing before 6am or circling the suburbs and infuriating long-suffering residents. Under the curfew only approved freight aircraft are allowed to take off or land between 11pm and 6am, with limited exceptions made for up to five passenger jets a day, but no more than 24 a week.

To all the complainants in SYD: well, lah bl**dy dah: get over it.