Uh, hello guys -step back from the moral implications or big government concerns, and think about your time and wallet. Not only should you not pay the fine, you should get a lawyer. The reason why is to prevent points from being put on your insurance allowing insurers to drastically increase your liablity insurance rates, or even drop you and require you to be placed in an assigned risk pool. This is critical in states (ie north carolina) where you can't drive without liability insurance. Also, in NC, by law you can lose your license if convicted of speeding 20 mph over the limit. So if you were way over, you need professional help. I'ts not likely the judge would go for the jugular, but if they did, you'd be in a world of hurt.
I've gotten 3 tickets over 25 years of driving. after each, I get about 8 letters from lawyers offering representation for a fixed fee, plus fine and court costs. I select the most likely one, usually one that was a former assistant DA or whatever, sign the form, give them the credit card number and forget it. They make their back room deals in batches of 50 tickets at a time, and I get a letter from them after the court date saying that my case was dismissed. total cost $100 for the attorney and $100 court costs. An insurance bump could be $300 a year for 3 years.
So get smart and get a traffic experienced attorney. there's other strategy that you can research online. For example, if you get popped by a city motorcycle officer, you're cooked (without a lawyer) because all they do is traffic stops and they are real world technical experts on their equipment and how to convict speeders, and they always show up to court.
Now, if you get a parking ticket, pay it and move on.