It was a typical winter morning on the Twitter feed of Eastern Shore television station WBOC: a stream of messages about snowfall and a reminder to download the station's weather app for the latest updates.
Then the Cyber Caliphate arrived. Just after 11 a.m., the station's logo was replaced with the image of a masked man, and a torrent of propaganda supporting the Islamic State spewed onto the feed.
"Infidels, New Year will make you suffer," the account's new controller warned.
The cyberattack grabbed national headlines. But it was just one among scores of hacks that have affected...