My German friends on this board may be more knowledgable, but when I was there, there was a news story about an East German who was shot trying to escape to the west at the Lauenburg crossing.
At the crossing at Lauenburg (1979), I went to see the "Iron Curtain" myself, and shocked at all the efforts to keep people IN.
That same day, not knowing the rules, I crossed the 100m line while taking photos of the grey guard towers on the other side. A loud speaker blared that I was commiting "espionage" and was to walk to the guard station on the East German side with my hands up, and turn myself in.
An East German soldier (looked just as much as a kid as I was) poured out of the guard shack...pulled back the bolt on an AK47 and pointed it at my head.
I was in the process of giving the East German soldier the one-finger-salute when I could hear the footsteps behind me of the West German Grenzeschutz officer...he said, in German, to SLOWLY walk backwards until we were back over the 100m line and then go to the West German Zoll (customs) shack.
I was detained for 45 minutes while they told the East German border guards that he had confiscated my film and destroyed it. (He hadn't).
I wasn't trying to "break in" to East Germany...I just wanted photos to show my friends back home the extent to which a country would go to not let it's inhabitents escape.
It almost cost me a AK47 round in my pumpkin.

No bad feelings though...I broke the rules.
68ROX