After learning that one exhibitor attending Friday's trade screening for ""Star Wars: Episode I _ The Phantom Menace'' in New York quietly sold his two passes for $400 to ""Star Wars'' fanatics, Fox instituted more draconian measures for Monday night's press screening in L.A. Journalists turning up for the two showings at Mann National Theatre in Westwood were required to present picture IDs at the door. Now Fox execs need to figure out what to do about the guy who bought two tickets to the San Francisco premiere of ""The Phantom Menace'' for $500 and is now hawking them on the Internet for $1,500.