I can see the point, and yes, it could possibly happen that way.

Nevertheless, a governmental declaration of "National Security" would be an admission that something is indeed going on in the realm of "chemtrails", and this is a good place to begin with a publicity campaign.

In short:

Tell the public that you tried to sue because of this activity and the government said, "What we're doing is a matter of national security."

Basically, we then have an admission.