Your trip to the local multiplex to check out the big new Hollywood blockbuster may soon include an element you hadn’t bargained for: a bag search and pat-down to insure that you aren’t carrying any video cameras or camera phones that could be used to illegally record the film for later distribution. In-theater searches aren’t exactly a great PR move for the industry, but officials insist that they may be the only way to stem the tide of pirated films.