Akali Dal, don't take this the wrong way mate but P1ss off and don't come back (To Australia that is). I've passed through Oz customs plenty of times over the past few years and found them all to be professional and polite. They do know how to spot a w@nker though, hence your alleged problem.
I've had the unfortunate experience of having to work with some of your fellow countrymen previously. A bit of authority and you expect everyone to kneel and kiss your feet. Might work where you come from sport. Here, you're no better than the bloke waiting outside the terminal at the wheel of a cab.