Do we really need all these networks of connected devices? A refrigerator that can use the internet? Connected thermostats? And, if you do use these devices, how about throwing a little security on them so that they can't be used in attacks like this? On Friday, epic cyberattacks crippled a major internet firm, repeatedly disrupting the availability of popular websites across the United States. The hacker group claiming responsibility says that the day's antics were just a dry run and that it has its sights set on a much bigger target. And the attackers now have a secret weapon in the increasing array of internet-enabled household devices they can subvert and use to wreak havoc.