A Philadelphia judge has dismissed a defamation action filed by a staffer of state Sen. Vincent J. Fumo against an operator of an anti-Fumo Web site who posted a Philadelphia Daily News article that incorrectly identified the staffer as having been subpoenaed following a federal probe into local parking ticket fixing. In D'Alonzo v. Truscello, Judge Nitza I. Quinones Alejandro argued that the federal Communication Decency Act specifically shields from liability Web site operators who make available information created or developed by others.