Maybe I inferred too much from gp's comment and replied very tongue-in-cheek. Obviously I could have also said "accessible from Saxony (for the neo-nazis there), Cologne (for remnants of the red army faction) or Uganda (in case Josef Kony ever decides to turn up in Berlin)". Hope I now covered all major political and religious extremes.

Back to the topic: Munich had something for the S-Bahn, the commuter train system, in their app for several years already. I really doubt that it's a security risk and find it sad that this is the first reaction something as nice as this gets.