Oh David, David - you don't know anything, do you?
Do you seriously believe that not carrying your ID-card in Germany incurs the pithy act of interpellation that you depict in your charming faux-Cleesian vaudeville routine?
Oh no, my dear friend, here in Tschermany we have other vays of making you pay for not being able to identify yourself properly (and, no, your adult video club membership card does not count as "properly")! The usual treatment involves tearing the flesh from your breasts, arms and thighs with red-hot pincers, burning the hand that should have held the object of identification with sulphur, and pouring molten lead, boiling oil, burning resin, wax and sulphur melted together on the pitiable rump that remains of your body after this treatment.
After that you will be drawn and quartered by four horses, your limbs and body consumed by fire and your ashes thrown to the winds (morbid details via Michel Foucault, Discipline and Punish).
That'll teach you not to carry your ID-card!
But that's only the special Sunday treatment. The rest of the week you will merely be tasered.