Roger Grimes: Facebook’s “redirect error” gave us a glimpse of future hacker attacks. The average popular website links to all sorts of sites and services, with the typical home page featuring more than a dozen third-party links. Your website or service is only as secure as its weakest link — literally, he says. Facebook’s error that slammed thousands of websites for an hour could have just as easily been a malicious hacking redirection. The value of a telecommunications network is proportional to the square of the number of users.”]