I really don't understand the boner so many Americans seem to have for vigilantism
Just fix your goddamn police system - there's a reason why vigilantism is outlawed since it's too easy to misjudge or misidentify stuff and the consequences are horrible - let professionals do their job properly
And the German government in charge of the ticket already voiced their interest in making both tickets compatible so that people can use the traffic in either country with the ticket of the other one
Could lead to a pseudo-standard that could result in an eu-wide ticket of such type in the long run