The current debate over political advertising in the Washington, D.C.-area transit system moves the issue from “free speech” to “public safety,” and probably toward the Supreme Court.
In Schenck v. United States (1919). Justice Oliver Wendell Holmes, Jr. wrote in the unanimous opinion, “The most stringent protection of free speech would not protect a man in falsely shouting fire in a theatre….” Does posting insulting (or any) depictions of the Prophet Muhammad on city buses and trains create a “clear and present danger”?