Brisbane seems to be the training ground for Border Force / Customs.
From a former life in the i remember Brisbane as THE airport where airline crew was hassled far, far more than in other airport in Australia.
Of course, airline crew is the easiest target and will rarely make a fuss. Even after a 15-hour duty day.
Along those lines, I think it is excellent that the fines for smuggling in food, plant material and such organic matters have been SIGNIFICANTLY increased. The amount of stuff people WHO LIVE or STUDY here "forget" to declare is mind boggling. Feigning ignorance doesn't cut it. Rules are clearly explained in many languages on every flight into Australia. And the countless pictures and displays at airports after you land are more than clear.