Two stories regarding the long arm of the law.
Caching in Orange County California - long way from home. Investigating a large electrical box on the side of one of their mega-malls. Here a voice say, "Excuse me sir, but what are you doing?". Explain caching, and chat for a bit. She is satisfied and moves on.
About four of us caching on the University of Oregon Campus at night. Two bike cops ride by and then return a few minutes later. Again, explain caching. This time they HELP. Still end up with a DNF. If it was easy, it wouldn't be fun.