You, Sir, are an idiot.
1. Nobody I ever heard of ever had to sign any documents requiring silence.
2. My experiences are mine to share if I choose to. You, on the other hand, are perfectly free to mind your own business.
Hmmm.....You call names?
That says a lot about YOU, not me, sir! ;-)
I do not mind my own business if I feel that U. S. national security has been violated.
If nobody you ever heard of had to sign such papers then you are very low on the totem pole when it comes to security clearances.