Act suspicious and you'll be treated suspiciously. Everytime I've been stopped, the first thing I do is tell the officer I have a loaded firearm and where it is. They usually ask me out of my Jeep at that point and I'm totally cool with that. I want him to be and feel safe. I'd much rather not give the officer any reason to escalate the situation.
If I ever felt like I was wronged by an officer, that's something I would handle later and formally. I wouldn't expect to win an argument roadside. Even if I was 100% correct, when the officers backup arrives, I expect them to side with the officer.
Here's how it's supposed to work:
Step 1. Be polite. Show ID
Step 2. Don't get Rodney King'd.
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