I learned long ago that it's better to stay low key in life. I don't drive 100K cars, wear expensive jewelry or dress like I'm rich. I live in a nice home in a middle class neighborhood and have no desire to move to Beverly Hills or own a new Mercedes. My used Lexus gets me down the road just as good. Being flashy will only draw the attention of low life's and there are a lot of them around EVERYWHERE!
I'm triple careful when I go out at night because that's when the vampires come out! I'm always paying attention to who's around me and who's looking at me. Just call it a good poolroom education

. And if you're a bad guy you better be careful with this old man. I could be packing and I won't hesitate to defend myself or others.
For the most part I've had no real problems in life (have had my home burgled once and been the victim of a pickpocket in Manila), but it may be my knack for spotting them first and saying hello with a slight smile. For a bad guy it's disarming when you confront them and look them in the eye. They are looking for weakness and an easy mark.
I also always leave a Do Not Disturb sign on my hotel room door and empty my own waste baskets, and if I'm there a few days I will let the maid clean my room with me there. My money and valuables go with me when I leave. Better in my car then my hotel room.