Quite on the contrary, I actually think the cops are getting a bit easier... well, not quite easier, but slightly more lenient. A mate and me were driving down Princess Highway Noble Park and we heard sirens - surely enough a cop car stopped us and demanded to see our engine bay etc.
We had a good chat with the cop, they were quite good - in the end he said: "look, do me favour and just take your blow off valve off and get a stock air filter put back in (as you have a frontmount - only 1 air induction mod per vehicle) - I'll let you know this time as I know it would be a hassle to clear a defect notice..."
He was very good to us - I suppose you get your days.
But yeah, it's getting so hard... that's why you don't really see much hotted up cars out there... most are all stock looking with probably HID's and RIMS. Not worth it ... I've gone stock for most of my car too... damn it, they're making it so hard... but suppose on the flipside, too many people are dying on the roads...