The catch is.... why would you be carrying a drivers license if you're not driving???
Cops can only write tickets to John and Jane Doe without a drivers license... unless, of course, you OFFERED them your name!!! If they ask for your name, address, SSN, etc.... so they can fill in the blanks on their uniform traffic ticket citation.... why not ask, "Am I obligated to have a name? Am I obligated to have an address? Am I obligated to have a SSN?" The correct answer is "No", "No", and "No". After he replies accordingly, ask if he has any further questions and if you're able to continue exercising your right to free travel...