I can see the reasoning behind that, but why not have unmarked cars?
Motorists would not who was a copper or not.
I asked for H'way Patrol to have an unmarked car come and sit in amongst the cars parked at our local school, some parents drive like idiots, and others use the street in front of the school as a short cut through town.
Atm, the H'way patrol sits in full view, so someone from some 300 meters away can see them like a pimp on a nose.
Also, when one parent sees the car, they phone everyone else to let them know.
The Copper told me,
We can't have a patrol car sit in amongst the cars around the school because that is 'Entrapment' and having the car visible stops people from speeding.
I asked him, isn't better to have motorists think that there isn't a patrol car is around the school, Oh what a surprise when they get pinged.
He told me that it is better to have a car visible so nobody speeds, this is proactive Policing.
I told it him it was BS policing.
In 30 0dd years,
I've been fined once for speeding.
Once for overtaking across double yellow lines.
Once for not having my licence on me,
And once for Noisy exhaust due to management of vehicle.
Now, I'm not saying that I don't break the road rules or speed.