I am not sure I am qualified to answer this question, sense I am close to 50 years old, and I live in a fairly safe place to live.
First of all, you can not show any fear at all. "Bad guys" are like dogs, and they can sense fear. Fear is a weakness to them, and if they can not sense any fear, they tend to leave you alone. At times, they will even show respect for you.
Also, you have to smile, treat people right, and bring out the best in them. Aggressive people do not go around beating up every person that crosses their path. In fact, they get into physical confrontations with very few of the people they encounter. You have to do something to even get their attention, or more to set them off.
Ever sense this World Federation of Wrestling began, there seems to be a few guys going around just looking for someone to take them on. The only problem is, the only power they have, is the power of what for me is the enemy. I have the power of God on my side. So, I make sure I am on good enough terms with God, that I have more of His power in my life, than they have the power of the devil in their life. The Bible says, one can send 1,000 to flight, as Samson killed 1,000 of the eneny, single handed with the jaw bone of an ass. Two can send 10,000 to flight. Because God and the angles are on their side, and it's God who fights our battles for us.
There is a story they tell about Mother Teresa. She was going to go into a area where bullets were flying between to groups that were at war with each other. They tried to talk her out of going into that area, but she felt directed by God, so she went in. As soon as she arrived, a peace settled over the area, and the cross fired stopped. As soon as she left they started to fight and the bullets began to fly again. At least that is the story I heard.
Another great story was written by David Wilkerson in the book "The Cross and the Switchblade". Where he went into the worst gang area of New York City to explain to them God's way of love & peace. He still has a good sized church in NYC where he has helped a lot of former prostitutes, drug addicts, gang members and so forth, to find they way to God and to leave their violent destructive ways behind them to take the road and the way of peace.
It's difficult to explain, but the bottom line is, that love is just more powerful than hatred. An Atomic bomb is not the most powerful force, because it can only destroy. The resurrection power of God, is far more powerful, because it give us eternal life. Thanks, JohnR7