Shamai Liebowitz, extreme-left-wing Israeli who moved to the US because he no longer felt comfortable being in Israel, found work translating Hebrew documents for the FBI. Not documents of the FBI, mind you: for the FBI. At some point he leaked five of them (5) to an unnamed blogger, who talked about them on his blog. Liebowitz is now looking at 20 months in jail. No-one seems to be claiming he was merely bolstering American democracy, as any good citizen ought.
(How far extreme, I hear you asking? Well, in 2002, when he was serving as Marwan Barghouti's lawyer, he told a court his client compared favorably to Moses, the fellow from the Bible. The judge wasn't amused).