Im a night cacher so 99.9% of my caches are found in the dark with flashlights. so its a common occurrence to have the police stop and ask what Im up to. so far I have only had one officer not to have ever heard of Geo Caching before.and had to go into great detail showing and explaining the whole thing.Once I did this he said he was going to check into it more because it sound fun.
I have had officers actually help me look for caches before.
I once found a bag of stolen guitars,cell phones, guns, ammo , and drugs while searching. I called the police and turned it in...after about 3 weeks they called me back and told me I could come get the Guitars that no one has reported them stolen and they know nothing about them.. they kept the guns and everything else.