The title question refers to the recurrent news stories at the time of young Western Europeans lying by the thousands across railroad tracks to block trains carrying nuclear weapons. The four young people we meet here--all affiliated with the European Democrat Students, all far from suicidal--are fresh and appealing, and have a clear-eyed view of the world that would do credit to their elders. Miss Stego: "The Soviets have been able to scare everybody to death in Europe." Mr. Buckley: "What happens when you are scared to death? Disarm?" Miss Stego: "Yes. There are some very politically minded groups and leadership within the peace movement, but the lady in the street, the kids, any person in those big marches, are basically afraid. ... That's the main difference between the United States and Europe."