Carry everywhere, all the time.
Most of the victims of this "game" are blindsided, one second they are walking along, minding their own business, the next second, they are on the ground unconscious. No chance whatsoever to use a concealed weapon.
The attack is completely unprovoked and the goal is surprise.
The victim has no time to react.
It often happens in broad daylight, in public thoroughfares, in "good" neighborhoods.
You don't see it coming, and it happens when you are least on your guard.