At the moment it isnt disallowed, but the politics want to disallow it.
And yeah, they control very much...
...the police is allowed to control your pc (if they think you want to kill ppl, like terrorists).
You arent allowed to buy some games here in germany, one of the funniest story was Cooking Mama 1 for Wii. Its not rated by USK -> Wont be sold in Normal Stores. -> If you buy it in the internet you need to send them a copy of your Pass (Ausweis in German, shows your day of Birth, your Name, your Last Name, Everyone of them own a Unique ID...) because that game is 18+ if it isnt rated.
I know a Wolfenstein (Enemy Teritory is allowed) isnt allowed because it shows to often the Nazi Signs and it shows Hi*ler (He isnt German, he is from Austria). But you can see Hi*ler in Madame Tussauds in Berlin.
Germanys law is strange...
...in some cases.