The "pig" was doing his "job".
You don't get mad at cashiers for giving you the correct change, you don't get mad at garbage men for taking away your trash, and I bet you don't get mad when cops nab a pedophile. Sounds like he was actually even nice to you. You seem to be raging on the cop and raging on the system (for the size of the fine), but in the end, your conscious decision to break the law is what precipitated the entire event. You should be raging on yourself AND/OR accepting the fact that you made the decision and just pay up.