I was pulled over coming home from Coles (Chapel) the other night. A motorbike cop heard my 'Pssssh' on gearchange.
He asked (re: the BOV) if I had one, I said 'two actually - they are stock on a GTR". He looked at my licence and tyres and said "that's fine, sorry to bother you". He didn't ask to look under the bonet.
Polite, truthfull responses (and no P-plates) make dealing with cops OK