I have the utmost respect for police in general, their job can go from routine to a nightmare in a heartbeat.
But, and there's always a "but", we have some in the local boroughs and townships who could use a little more people skills and maturity.
I normally ride and drive the speed limit +5 mph unless it is a 15 or 25 mph zone. Usually when it's posted that low there's a reason.... so I keep it at that speed.