The government may intend the non-disclosure provision to serve some purpose other than the suppression of speech, ... Nevertheless, it has the practical effect of silencing individuals with a constitutionally protected interest in speech and whose voices are particularly important in an ongoing national debate about the intrusion of governmental authority into individual lives.  -   Janet Hall     Quotes
The government may intend the non-disclosure provision to serve some purpose other than the suppression of speech, ... Nevertheless, it has the practical effect of silencing individuals with a constitutionally protected interest in speech and whose voices are particularly important in an ongoing national debate about the intrusion of governmental authority into individual lives. Janet Hall