This freedom of movement is the very essence of our free society, setting us apart. Like the right of assembly and the right of association, it often makes all other rights meaningful-knowing, studying, arguing, exploring, conversing, observing and even thinking. Once the right to travel is curtailed, all other rights suffer, just as when curfew or home detention is placed on a person.
Once the government can demand of a publisher the names of the purchasers of his publication, the free press as we know it disappears. Then the spectre of a government agent will look over the shoulder of everyone who reads. ... Fear of criticism goes with every person into the bookstall. The subtle, imponderable pressures of the orthodox lay hold. Some will fear to read what is unpopular, what the powers-that-be dislike. ... fear will take the place of freedom in the libraries, book stores, and homes in the land.
The free state offers what a police state denies - the privacy of the home, the dignity and peace of mind of the individual.