Experts believe millions of Americans will have their identities stolen in the next five years, which is why WCAU-TV in Bala Cynwyd, Pa., is taking action to make sure its viewers know how to protect themselves. For the past four years, the station has held quarterly "Great Shredder Events." The station broadcasts live from each event as hundreds of community members dispose of documents containing personal information. The station disseminates information on additional ways to protect identity both through paper materials at the event and through the broadcast of feature stories. To alert viewers of the service, the station runs public service announcements and airs segments throughout its newscasts. Consumers also can visit the stationís Web site and sign up for email alerts regarding future shredding events. The "Great Shredder Event" was the brainchild of a WCAU consumer reporter, and its success has led to duplicate efforts at stations throughout the country.