I bought my Riceline before I got my full licence and was never pulled over for anything.
Things you should know:
1. My car was standard. Standard ride height, standard intercooler, standard exhaust, standard lights... STANDARD STANDARD STANDARD! So the car itself didn't draw excessive amounts of attention
2. I was constantly paranoid that I would be pulled over, so my driving reflected such. Road rules were srs bsns! So much driving didn't draw excessive amounts of attention.
3. I am the first Australian owner of my R33, so there wasn't any bad notes on the rego to make me any more suspicious.
4. There is only one traffic violation to my name, so I'm not flagged as someone that needs to get their arse kicked.
5. Where I drive I am lucky to see one police car in a week.
So! If your car is loud and gawdy, you drive like a complete dick, you or your car has history of being driven like a dick and/or you live in an area with high police presence... I'd keep a jar of lube in your cup holder