Veteran actor/director Robert Redford feels sorry for screen heart-throbs Brad Pitt and Tom Cruise, because it's so easy for potential stalkers to track stars down these days. The 71-year-old, who had his share of obsessed fans during his '60s and '70s heyday, admits today's celebrities have to deal with a lot worse than he ever did. He tells Playboy magazine, "On my birthday one year, we were on the property in Utah and some woman came down out of the trees. She was stark naked and carrying a cake, walking toward the house. They led her away, but there was always another girl. "Sometimes I don't know how I survived, but I really don't know how the younger generation - Brad Pitt, Tom Cruise and everybody on down - survives, since it's a thousand times more intense."