Warner Bros. is so anxious about piracy with “Matrix Reloaded” that security is fierce. “Reporters attending a preview of ‘Reloaded’ on Thursday night at Warner’s Burbank studios were subjected to the kind of high security normally seen at airports, not movie theatres. Journalists were required to present government-issued photo I.D., either a driver’s licence or passport, to the super-serious Warner guards, who ominously resembled evil Agent Smith from the movie. As the scribes entered the theatre, they were told to empty their pockets, so as to prevent anyone from smuggling in a miniature digital video camera.”