You can always go to court and ask for a reduction of the offense. What that may get you is a reduced charge but the same fine. No, I don't recommend that you try to fight the officer on his remarks on the ticket. The Court is only going to care about the stop sign. You can call the recorder's court in Paulding and ask them what the usual fine for a stop sign ticket will be. Sometimes you can pay early to save yourself some time in Court. The stop sign ticket is a 3 point violation on your record, so it helps if you can get the charge reduced even if you pay the same fine.
I know you are aggravated about the police officer's behavior, but this is not really a great fight for you to win. Good Luck.