Robert H. Jackson, Cole v. Arkansas, 338 U.S. 345 …
“ Quite another question is involved when one is convicted of promoting, encouraging and aiding an assemblage the purpose of which is to wreak violence. Such an assemblage has been denominated unlawful by the Arkansas legislature, and it is no abridgment of free speech or assembly for the criminal sanctions of the state [p354] to fasten themselves upon one who has actively and consciously assisted therein.Similarly we find no merit in petitioners' contention that the Arkansas statute is unconstitutionally vague, so that its application in this case violated due process of law. ”
