Call me naive, but this troubles me…

Citizenship Checks Upset Wash. Ferry Passengers : NPR
The U.S. Border Patrol has started doing spot checks on ferries coming from Washington state’s San Juan Islands. These are domestic ferry routes, completely inside the borders of Washington state.
Doesn’t this sound like to you “Citizen, where are you bound?” or, even worse “Citizen, your papers, please?”
I understand the necessity and realities of border security, but its a horrible, Unamerican precedent.