Eh, what about "all the Insurrectionists are terrorists"?

Based on what's shown, it looked like that though (and what you said...). But considering how much more we know about the UNSC, it seems my statement might be closer to truth (and remember that beginning of Ghosts of Onyx, the Insurrection wanted to negotiate (a ruse but that's not the point), the UNSC ignored that). But yes, we need more info. And hopefully we'll get something in the future.
Halsey is arguably just as much at fault as ONI, she did her job willingly after all. The same can't be really applied to "grunts", like the drill instructors, they just follow their orders (indeed, didn't many nazi guards on the concentration camps just follow orders? I'm not defending them, just want some comparison but i'm afraid i'm not sure about this, so please correct me if i'm wrong). EDIT ah, really bad comparison really, i reckon. What was the law about internet discussions and nazis?
No security is perfect, she's clever and intelligent enough she could've, maybe, released the data to public, and once public, it is practically impossible to suppress the spread of information any more.