For those who didn't get around the Wall Street Journal's firewall to read the story previously mentioned (or didn't try to), TIME has offered a short synopsis of the WSJ's vulnerable electrical grid vulnerability to attack story from last week.
This isn't fringy, conspiratorial stuff. It's mainstream media reporting on real government assessments.
H/T: Woodpile Report
Update: The FERC folks seem a little rattled by recent public disclosures