You must mean in addition to other factors of clothing/posture/presence, right? I'm not a LEO, I wear M-Frames pretty much whenever I'm outdoors, and I know quite a few other non-LEOs who also regularly wear Oakleys or similar. (Most either are currently or were previously athletes or outdoorsy folks of some sort.) I guess if criminals mistake us for cops and give us a wide berth as a result, I'm good with that, but I find it surprising.