Kickniteasy, I agree with you completely that the law is black and white, it states which things are acceptable and which things are not acceptable. Justice, however, is not as black and white. Breaking the law for one reason does not always merit the same punishment as breaking it for another. There is a common psychology study where a child is presented with the following scenario:
A man needs medicine for his dying wife, but cannot afford it since he stopped working in order to stay home and attend to his wife. He asks the pharmacist for the medicine, but the pharmacist demands payment. In order to save his wife, the man steals the medicine. Was he wrong?
Technically, he broke the law. But I think that anyone with any moral reasoning (the focus of the study) would agree that the man did what he had to do. A human life is more important than the lost profit from the stolen medicine. That is why the judicial system exists.
In this case, the guy was technically speeding. But do his actions merit the punishment (cost of fine and potential increase in insurance)? I don't think so. I'd be willing to bet that at least 95% of cars that go 69 in a 65 won't get pulled over due to their speed. I'm sure both the cop and the judge have gone 5mph over the speed limit on the highway.
I think that you should fight the ticket, but be honest about it. That's why you have the opportunity to present your case to the judge.