So far, I have had pleasant dealings with cops and my firearms.
1. I had a car break down in the middle of the road (I got to the side but was blocking a lane). I had some handguns in my trunk in a pistol case. When the wrecker and my ride showed, I went to transfer them to the car I was leaving in, I started to inform him about the guns just to be courtious, and he stopped me mid sentance saying that he saw the Glock sticker on my pistol case and that it was okay.
2. I was in a no fault wreck on my way back home from the gun range and happened to be OCing at the time. I didn't get a lick of trouble from any of the LEOs or EMTs on the scene.