I for one respect, salute, and will go out of my way to--reasonably--aid a proper law enforcement officer.
But I've had a couple times where bottom-of-the-barrel cops decide they're bored and start hassling me just to try and weasel something out to occupy themselves, or the officers that subdued and tranqed a mildly mentally ill man the night I was arrested (on falsified and later dropped charges) for whistling a tune to himself, or the one behind the computer and BSed me for eleven hours before she would tell me my bail and the actual official charges, or the one that shoved me toward the fingerprinting line while stepping on the back of my shoes.
And the ones that much more recently made me wait an hour to get my fingerprints for my CCL, while other people were in and out in, literally, five minutes. They didn't hassle the soldiers going in for the same thing.
It's unfortunate they're around, and far more that they're the very much more visible minority.
On the other hand, my arresting officer was very nice, chatted with me on the way to the station, and complained to the school board that the AP was pressing BS and borderline charges. Then checked on me during the process, encouraged me to use his phone between periods of school to call the legal clerks that were harassing me for not being at home during school hours, and even gave one of them a royal reaming when he heard her screaming through the phone from across the room. Kudos and my gratitude to Deputy Smith.
Until I can figure who's who, I keep my trap shut aside from yes or no answers. After a few minutes, it's usually pretty appearent.
Anyway--IBTL.