This is interesting to discuss. I remember one time I was at a gas pump and someone was walking around asking for money. My music was on in the cab of my truck, and it was broad daylight at a buckees gas station in Texas. He got close before I noticed him, I put one hand out and one on my gun and said "Sir, I dont have any monry for you, and you need to go away please. He never saw the gun(didn't draw it) and I never got a threatening vibe, but you can't be too careful. but he was danger close, If things happened differently, it would have been close quarters, knife distance. I would have had one hand out and hipshooting. But If that went that far bad, Id also probably be stabbed several times. That was several years ago.
Two days ago there was a guy outside Dicks Sporting Goods in the back of the lot sitting down under a light pole. When I walked up to my truck, he stood up and looked at me, I kept staring at him over my shoulder and switched keys to my left side, and kept my hand near my right side, I tried to stay away of what and who else might be around, while getting to my truck, while keeping an eye on him. Once he got within about 20 feet he asked in I had any money and I said I didn't, and got int my truck while paying attention.
For me, this isn't bragging, and these aren't even "close call situations", but when anything like this occurs my mind goes "this poor guy probably just wants some money, but what if..." and I analyze the most dangerous course of action and prepare. For me, I learned over time situational awareness, but also body language. The second guy saw me and I gave him the body language of "I see you" "You're standing up? Now Im watching you." "Hell no, Im not playing games." and my defensive, assertive posture said everything he needed to know. Im not sure whether he intended to get money or not, but your level of awareness and when you start sending signals can often times determine how close these encounters get. A lot of times you just cant. But situtional awareness can keep something from sneaking up on you like it did years ago when I was at that gas station.