So what happens when a police officer approaches you? Well, sometimes they aren't interested in you and pass on by, a greeting might be nice and all that is called for. But, I would guess that most of the time if the police officer is approaching you they have a reason for it. I mean, if I were a cop, I probably wouldn't ever interact with anybody without a reason given that I have to force interactions with people constantly as part of the job. I'm sure Officer Friendly exists out there somewhere, but I wouldn't count on him being the guy who approaches me for no other obvious reason.