If you have a child who's old enough to use the Internet, you probably know all about online dangers -- everything from violent games to teen chat rooms invaded by sexual predators. You may think that you're doing enough to protect your family by putting strict limits on your child's Web surfing. But, as Correspondent Susan Spencer reports in this story that last aired in September 2002, it may not be enough to stop your child from being lured halfway around the world into a web of seduction