When it comes to advertising on the D.C. metro, free speech is in for a bumpy ride. In a classic case of viewpoint discrimination, a federal judge is siding with the Washington Metropolitan Area Transit Authority (WMATA) for turning down ad space to the Catholic Church. WMATA defended the move by saying it bans “religious, political, or advocacy” messages (depending on who’s defining them, apparently, since the Human Rights Campaign still enjoys a prominent space in the subway’s line-up). Even so, the Archdiocese of Washington complains, nothing about their message was overtly spiritual. The scene is three wise men, two...