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.
I have nothing against 3-D in theory. But I've also never run to the movies because something's in 3-D.
What this does for me emotionally, psychologically and spiritually - to look in the mirror and not be ashamed - has been very important in not relapsing.