There was a CIA agent in the 60's who was part of the machine destabilizing Central and South America, but he fell in love with a local and realized that being a state-sponsored terrorist wasn't so cool. I don't know the real truth, whatever that might be, but he kicked around the world with his wife and family trying to find a place to live where he could be somewhat stable, however he kept finding that the long reach of the USA would uproot him by putting pressure on whatever country had taken him in.
He was before my time so my limited knowledge is that he effectively did very little to harm the establishment, CIA, etc., and he served as a perfect poster boy for the system of what happens to bad little destabilization agents who suddenly get an attack of conscience. I believe he finally ended up in Cuba and died there fairly young (late 50's?) and poor, loved by few, considered a traitor by most, blah, blah.
Maybe Snowden will become the new "continuously in the news at opportune moments" poster boy for what happens to self-important whistleblowers. Right now he's perfect for directing anger at only the current President about a long-term surveillance state program that is fundamental to the system, not peculiar to Obama.