When i was on my Ls, i did a bit of freeway driving. Driving at 90km/h while everyone else is doing 110km at least is very scary and dangerous to other other drivers as well as myself. I agree with "dangerous" daveo that the safest way of travel is moving with the flow of traffic.
Police hiding in a roundabout snitch way is purely revenue raising. I recall seeing statistics that more people speed on the freeway but more accidents, injuries and deaths occour on roads away from the highway. To me, in my opinion, this is purely for the purpose of paying for their donuts.