"assur[ing] that those who are accused but exonerated by the grand jury will not be held up to public ridicule." a at 218-19; see United States v. John Doe Inc. I, 481 U.S. 102, 109 n.5 (1987); United States v. Eisenberg, 711 F.2d 959, 961 (11th Cir. 1983); Lance v. United States Dep't of Justice (In re Gra