Lesson from Petraeus CyberClusterFuck: Email isn't safe.
Geoffrey Fowler and Evan Perez in the Wall Street Journal write about
one practical (and, yes, obvious) takeaway from the Petraeus scandal: "Privacy protections for even the most sophisticated users of consumer-email services actually protect very little." Or, as Kurt Opsahl from the EFF
puts it in the article, "If the director of central intelligence isn't able to successfully keep his emails private, what chance do I have?"