I don't think that's the same thing at all. The hacker hasn't entered or attempted to enter any Government premises. He's merely seen what is being transmitted over the internet and has found a way to view it.
It's hard to think of a parallel, but how about this? If I set up a webcam in my house and stream the video via the internet to someone else, intending the transmission to be private and not viewable to anyone else, what grounds do I have for complaining if someone else discovers my video stream and watches it?