Now this is a piece that is good.
Good advice.
When I was commuting to London every day for work. I practiced this.
Keep aware of what is around you. Look people in the eyes as you walk down the street and when on the underground.
This makes you look like you ate alert and not an easy victim.
Look like a victim and you will become one.
It works. Many a time I have seen people that looked to be up to no good and they passed me by.
Though I must note that you really have to be cautious about the pick pockets. They are unbelievably good. So keep your wallet in unexpected places where it cannot be gotten to easily.
Cheers all