As to the why.. I don’t believe we can disregard the call as a matter of course. I know that we can disregard non police related calls. But the ECC center dispatches the call. When I arrive, I look at the person to see if he is known for any reason. If he is a known felon...obvious problem...if not...proceed constitutionally
If you have time to go speak with the legal open carrier, you should have the time to talk to the complainant and nicely explain why they are wasting your time, that of the 911 operator, and that of the legal open carrier.
Wow! It's great to see that there's at least one cop in this country who has his $#!+ together. The attitude you're expressing here should be the norm.