YES!
Incident #1: Pulled up to a red light and had a guy run up to my car with the most likely intention of jerking me out of my car and stealing it. As he grabbed my door handle, I put my Colt .45 in his face, at that instance he lost all intent to do harm. No shots fired, nobody injured, just a "attitude adjustment" that might have a long term impact on his behavior. If he had so much as touched me, I would have busted his head like a ripe melon.
Incident 2: While walking to the parking garage one night, I saw a guy just standing on the sidewalk in my path. He was very intently staring at me so I decided to cross the street and walk the sidewalk on the other side rather than pass him. When I stepped out into the street he came out in a intersect path to cut me off. At that same moment I realized that another dude was sneaking up behind me. Stopping in the center of the road, I flipped back my jacket and let them gaze upon my Colt .45. Again, I was instantly removed from their "EasyTarget List", and again there were no shots fired and nobody injured on either side. Had I been a vigilante, I would have killed all three of these worthless pieces of shit and done society a favor. But being a law abiding citizen, I merely exercised my right to defend myself.
Bad people(wolves) only prey on the weak(sheep), they don't want to mess with the "sheepdog" that is willing and capable of killing their sorry ass.