This picture is not by me but from Wikipedia and is dated 1983. When I was living there, I don't remember any graffiti on the wall, so I guess it really by 1980 or so...

As for "leaving West Berlin", many people didn't have much problem with that: West Berlin population was actually decreasing with some young men staying there because they were exempted from military service (and moving to other Länder once they were past the age limit). Federal government was away in Bonn and businesses were relocating (Siemens HQ to Munich, etc...).