Just rewatched the excellent film 'Enemy of the State' recently. Even a
well-behaved citizen is foolish not to fear the NSA. Also, considering that
governments almost always enforce irrational morality laws (eg drug laws,
criminalization of homosexuality etc), and punish people who are more ethical
than them or their corporate buddies, I think there's good reason for
everyone to do what they can to secure their privacy when using computers and
the net.
Also, don't think you're safe just because you use USB sticks and never
connect to the net. That was how that Stuxnet virus was sneaking into that
nuclear facility in Russia:
http://gizmodo.com/did-a-usb-stick-infect-a-russian-nuclear-plant-with-stu-1462369236
