Travelers who want to keep U.S. border agents from seeing sensitive documents on their laptops and cell phones may be better off leaving those devices at home, a federal judge suggested Friday during arguments in a civil-liberties group's challenge to federal border-search policies. … For the plaintiffs: Arthur Eisenberg, Melissa Goodman and Christopher Dunn of the New York Civil Liberties Union; Benjamin Hillman, Catherine Crump and Hina Shamsi of the American Civil Liberties Union; and Michael Price of the National Association of Criminal Defense Lawyers.