Sad but true. I especially appreciate Ann Finkbeiner's commentary on this comic over at Last Word on Nothing, especially the bit I've emphasized, which is pretty amazing/unsettling:
I'm pretty sure if the NSA put their massive minds to it, they could figure out how to hear us thinking, let alone typity-typing on our computers without an internet in sight. Did you know that NSA is the country's largest employer of mathematicians? It is. Respect their powers.
Sleep soundly, everybody!