In the context of the Due Process Clause of the Fourteenth Amendment, various Supreme Court cases have shaped the interpretation and application of due process rights in relation to state actions. One influential case is Roth v. United States (1957), where the Court outlined the limits of free speech, declaring that the First Amendment does not protect all speech but only that which is considered 'purely informative.'
Given this context, which of the following statements best describes the implications of due process rights as interpreted by the Supreme Court relating to both substantive and procedural due process?