I got booked for 75 in a 60 zone a few months ago. The fine was an absolute load of crap, there is no way I in hell I was doing 75 - I've been driving Skylines for 6 years and know what they feel like at a given speed, AND I had a witness in the car (the car's owner) who can also verify that there was no chance I was doing the quoted speed. I wrote a polite, factual letter to the head of the issuing officer's station, also noting that the officer was rude, abrupt and basically wanted to get me out of there quickly so he could fine someone else, and all I got back was a load of drivel about how he had checked the tape and found the officer had done nothing wrong, the device was calibrated and operated correctly, and that the (now overdue) fine would stand. Basically I was told that this rude, arrogant, arsehole of a cop was completely in the right, that I had committed a crime that I would swear on my mother's grave I was not guilty of, and that I was now out of pocket $150 and down 3 points... oh, and the $45 late fee for going to SPERS. Yay for looking after their own, and their main source of revenue.
My last encounter with a traffic cop had renewed some of my faith in the police force (he was a champion, nice guy - I still got the fine but I didn't feel like I'd just been reamed)... and then this dealing pretty much blew it away again. They decided I was guilty, and that was that.
Ok ok, I'm getting to the point... basically they've fine-tuned the laws surrounding traffic infringements to the point where they can fine you for whatever they feel like and force you to accept it, regardless of whether you were actually doing anything wrong. If you can find a way out of it, great... if not, the cops have been unfairly raping people for years, you're neither the first nor the last. Yes it sucks but until we get a govt who thinks beyond the next election, this is the kind of crap we'll be putting up with.