Muggers are creatures of Habit;

The best way to get balance is to do life as normal; But keep an eye out for the SOB.
If you spot him, keep an eye on him and when he attacks someone else, ATTACK HIM!!! Its amazing how fast when someone attacks a so-called Preditor, how fast they scream in pain... It may Not be the legal or civilized way to deal with a mugger but I will bet the "Victem" will get a LOT of Satisfaction, along with protecting another potential victim