Security Zone Around the Reichstag in Berlin?

Out of the demonstration held over the weekend (roughly 38k participants), the city political folks (a coalition government with the SPD, Greens and Linke Party)....are now openly discussing an idea to put up a protective zone around the Reichstag (the German capital building).

N-TV carried a good bit on this topic in the early AM of Monday.

So what is the angle of this discussion?

There is anxiety going on about images (video) where right-wing flags or symbology would be occurring in the world press, with the Bundestag in the background.  It seems to be very disagreeable to the insiders of the political system. 

How would this protective 'zone' work?  Well, it's not that clear.

To the NE of the Bundestag, is the Spree River (maybe 100 meters away).  You can't really fence this off very well.

To the east is the Jakob-Kaiser building (government office building)....but marginally 50 meters from the rear of the Bundestag.

To the south?  You've got about ten meters then hit the Scheidemanns Strasse.  On the other side of it....a city park, with the national memorial for the Gypsies and Senti.

To the west?  A fairly big grassy area, with maybe 200 meters of space before you hit a street.

So putting up a barrier?  You'd basically have to call it a 'wall', and then Berlin society would start laughing because they've seen those before, and can recommend 'wall-builders' if the government needs them.

All of this....if you start thinking about it....creates a entry and exit drama for politicians in the Bundestag.  You have to either drive in, get dropped off, or ride the subway over the U-Bahn station about 200 meters away (the Bundestag U-Bahn Station).

A barrier or wall that would prevent the images?  Mostly impossible. 

The problem here....after unification....Berlin came under a unique design and became this 'picture-postcard'.  Everything is open and designed for a bicycle society to function. 

So I'm going to suggest that several designs will be put to the political folks, and each will suggest something that is dragging them back to the old Berlin-Wall days.  Eventually, someone will suggest chopping off the whole area around the Spree River, and creating a 700-meter circular zone, with forbidden access to the general public.