[On the Road to Serfdom]

The line is when you enter Federal land, they can set up a perimeter and check ID before letting anyone enter. No different from a military base. She was trying to enter onto Federal land and if she did not want to show ID she should have taking one of the bus routs that do no enter a Federal Facility.

[steve-b]

Again, there is no legitimate reason for any public bus route to enter a secure facility. (Creating a situation where random citizens who have no business at the facility may be required to show ID dosn't count as "legitimate".)