In a recent piece by Rabbi Avi Shafran, the rabbi asks, “You suddenly begin noticing signs bearing Arabic script in buses. What do you do?” Well, what bus riders in Richmond, Virginia did was call the local Transit Authority to find out what it might know about the signs, which had been turning up on buses and the walls of local universities. The Associated Press and other media outlets subtly scoffed at the concerned citizens, explaining that the Arabic phrases were in fact innocuous — translating as things like “paper or plastic?” or “paper, scissors, rock” or “I’m a little...