typical. Police doesnt take your driving license. Sure they can take the actual photocard, however being stopped in Germany on a USA license because you did something.. Yeah they might take the actual license, and you can reapply in usa for your license as lost. But that is not the point.
The point is, when stopped in Germany - you as an individual will be︀ banned from driving German roads. Having 10 other licenses does not make a difference. You︁ are banned. So if stopped on a second license by the Germans, you will probably︂ be kindly asked to pay a visit to one of the state sponsored airbnbs for︃ a few nights.
For example , underage boys who steal a car in the uk︄ do not have a driving license, but when caught, they still get a driving ban︅ as well as custodial sentence (or so we hope)
Dont believe everything you hear and︆ say..... the matrix wtf - he got souls to win and his pockets to line.︇ He aint no different than those tv preachers who will cure you for money