First of all, it is not a stated duty of the SoFA in The Stickies, Posts, and Polls Reduction Act (hereinafter, "the Act") that the SoFA should maintain the Atlas Forum Headquarters thread, therefore Fritz is actually acting in his capacity as a private citizen in maintaining the thread, and because of free speech can put anything in there that he wants.
Second, the title of the present Atlas Forum Headquarters is not the thread title specified in the Act and therefore is not considered to be authorised by the Act, and is therefore nothing to do with the Government, and is therefore something undertaken by a private citizen, and therefore protected by free speech.
I think the Attorney General has provided an adequate response.