Walter Block disagrees:
http://www.youtube.com/watch?v=RPeqXcJqkeg . His hypothetical situations at the end may seems unrealistic to you, but consider them as illustrative of the dangers of blanket prosecution over much more favorable voluntary solutions.
Collecting and understanding the evidence of a situation may be up to a a judge/jury, but natural law is not. A judge cannot lawfully reject the First Amendment, which universally defends whistleblowers. "That's the way our system works" is not an argument.
The issue at the heart of A Few Good Men was the notion that an enlightened minority can lie to a majority for the good of that majority. Jessup beats soldiers, our government drone-bombs children. And they both think they can withhold these acts from public view, because it's in the "public's interest not to know". Whistleblowers rightfully reject this view, as did the jury in A Few Good Men.
Okay, I'll use Stalin and his genocides. Does it make a difference?