Yes. Stumbled upon it and thought it is TOO invaluable not to share!
As ridiculous as it may sound, South Carolina's Legistlature has passed an act requiring "every member of a subversive organization, or an organization subject to foreign control, every foreign agent and every person who advocates, teaches, advises or practices the duty, necessity or propriety of controlling, conducting, seizing or overthrowing the government of the United States [...] [to] register with the Secretary of State on the forms and at the times prescribed by him." [Image from Wikipedia]
Subversive Activities Registration Act requires potential revolutionaries and "foreign agents" (read: terrorists) to submit a "Subversive Agent Registration Form" with the name of their "subversive organization," names of all members, and a copy of the bylaws or minutes of meetings from the last year ("if applicable"). There is a $5 filing fee. Oh, and those who plan subversive activities but fail to report and register might face up to ten years of imprisonment and/or a $25,000 fine. (Logically: if you were planning subversive or terrorist acts, you are granted the liberty of continuing with them, as long as you register, voluntarily. PRICELESS!!!)
This falls into the same category as Point 38/3 of the American Nonimmigrant Visa Application (DS-156 form), which asks the applicant:
"Do you seek to enter the United States to engage in export control violations, subversive or terrorist activities, or any other unlawful purpose? Are you a member or representative of a terrorist organization as currently designated by the U.S. Secretary of State? Have you ever participated in persecutions directed by the Nazi government of Germany; or have you ever participated in genocide?"
The noble intentions of such legislation are clear enough. What I am not sure about is whether the authorities really think that anyone planning (and/or someone who has participated in) such an activity would report it in the first place? Or is it just a cosmetic precautionary measure to further prop up the general perception of threat, and everything else that it enables...?