Starting with Chelsea Manning and Edward Snowden, Bruce Schneier has attempted compiling a list of recent/current US intelligence community whistle-blowers.
He counts 6 (possibly 7) of them.
This Warren Buffet quote seems relevant
Should you find yourself in a chronically leaking boat, energy devoted to changing vessels is likely to be more productive than energy devoted to patching leaks
(Score: 2, Insightful) by Anonymous Coward on Wednesday April 22 2015, @01:41AM
I'd rather Snowden did not face "justice". If leakers know they can get away with it, maybe they will be more likely to share and undermine the surveillance state. Assange is an activist, not a brown Islamic target for your drones.