It would be wrong to say that the city of Berlin is not regulated. What I think is more interesting is to what extent a city creates a sort of safe haven for its users, so that people feel confident that the city works on their behalf.
You automatically are trusting because not only is the person a friend, they are so incredibly gifted that you know someone is going to be able to hit the ball back to you across the net.
Life is a difficult game. You can win it only by retaining your birthright to be a person.