The one time I did get a ticket, I fought it and showed up in court with a shirt and tie and yes-sired and no-sired everybody. During my testimony, I made sure to point out that the police officer who stopped me was very professional and polite but mentioned that perhaps in an honest mistake, he overestimated my speed.
Others showed up in sneakers and jeans and had sort of a slovenly and sloppy appearance. I got my ticket dismissed. Don't know about the others but I don't think they fared as well as they had sour expressions as they shuffled out of the hearing room.
A cheerful positive attitude is key in this whole process. Cop an attitude and you'll be stuck with an expensive ticket - no doubt about it.
I would leave out the part where you admit guilt but otherwise you make good points. It may be wrong in a way but I don't write NRA stickers, pro-GOP stickers, vets and the like. I also won't write someone with their kids in the car. "Free Mumia" stickers get whatevever I can toss at them. I guess I'm human and I work in a target-rich environment so I can be picky.