How do you feel about whistle-blowers?

-Edited-

Thank you all for your responses. I was apparently given some misinformation about the Manning and Snowden cases. The two of them were just an afterthought from my original point.
The reason for my question was to get a bead on what the military community thought about the general idea of whistle-blowing. Obviously each case must be treated differently based on the information released and the implications of who sees that information.

I was originally researching the recent WikiLeaks development. The original angle I was looking at the problem from was not one of endangering national security, but from the position of integrity violations, and violations of the law by, lets just say for the purposes of this post, "hypothetical senior officials."

Personal violations or a collective group's professional violations.

I know we are extremely limited in what we can say and do as members of the military, and that we all took oaths to obey the officers and officials appointed over us. My primary concern is the issue of deteriorating integrity.

Slightly off topic:
My personal grid square is very small compared to many of the individuals here so I have no doubt my perspective is limited, but what do we do (if anything) in the event that the officials appointed over us violate the constitution that we have also sworn to protect?