I am a cop and I just found out about geocaching about a week ago. It is not suprising that people call the police when they see people get out of a car parked on the side of a road and walk away from it. (Dumping a stolen car??) You would be suprised at the things we get called for. Take kids or a spouse with you especially if a cache is hidden near a kids park or playground, or someone might think you are a pedophile and call the cops on you.
If you are questioned just explain what you are doing and why you are being stealthy avoiding muggles. We are mainly looking to see how you respond to questions. If you are straightforward; nothing will seems suspicious. For an outsider you have to admit looking for a waterproof container under some bushes looks a bit strange. If possible show the officer a print out of a cache. We would rather spend our time finding real bad guys, but we still have to check out all calls. Until they start tattooing "Criminal" on the badguys foreheads; we still won't know who we are dealing with until we talk to a person. Bad guys don't wear uniforms like we do.
Meanwhile, Keep on Caching..........
Bumper McV