Yeh it's this. There's stupid loopholes that allow them to get away with it. If the car is registered they can defect if, even if its on a driveway. If they have the believe that it'll be driven on public roads( which they do due to registration) then they can defect it. Technically shopping centre car parks are private property, they'd still defect you there.. What difference does your driveway make.. It's shit, but that's Vic