Well.. i have been done twice in 3 years of owning my R31.
The first time, it was spotted in the vicinity of the dandy drags and my plates were taken down from an UC. I got a letter 3 days later instructing me to take it to the cop shop for inspection. Outcome: major defect. ('tint on number plate' it was dirt... my stereo wire was not insulated enough through firewall & engineers cert was required) Plus a fine for the ex bf who was driving.
Second time was from the lovely stonnington police, i was polite.. and i just got a mouthful from the cop who obviously was in a bad mood. Called me a 'smart ass' because i knew what a catch can was.. and if i wasnt 'careful', id get a fine. Major defect that night too.. and a verbal warning to impound my car if he saw it again.
I just think its up to the cops to decide if they want to be nice or not.. females do get special treatment, IF they are lucky.