Ran into this at, of all things, my wife's naturalization ceremony.

Guards were requiring everyone to show ID to enter the courthouse, but were not checking it against anything. Family members of people being naturalized were being turned away until they went and got some form of ID to show.

Ultimately, I don't think anyone who wanted to attend the ceremony didn't get in, but I can just imagine the disgusting specter of someone being barred from being able to attend a citizenship swearing-in ceremony over something like this.