Sorry that was very short of me.
Whether or not one agrees with the laws and the punishments that are meted out to those that break the laws, they are there and there is no excuse for not knowing about them.
If one knows the speed limit is 70 and one is driving over that, then one should accept the consequences of one's actions.
I have had a few speeding fines over the years and every single time I have just sucked it up, paid the fine and moved on. I accepted I was in the wrong.
I understand there may be times when speeding is necessary, in an emergency for example, and they should be disputed on an individual case.
But in general - If one doesn't speed one has nothing to worry about.