Propaganda is a crucial part of the military; there are even divisions in modern militaries whose sole job is create propaganda/misinformation. This material is clearly deemed of some quality or grade that would deem it possible effective against a target. Given that it is the job of these departments to influence the information and human psychological "playing fields", then I would give that context a label of "military grade" -- in that it is as powerful as information warfare techniques used by entities whose sole job it is to engage effectively in information warfare.