If the Government is going to intrude upon the sacred ground of the First Amendment and tell its citizens that their exercise of protected speech could land them in jail, the law imposing such a penalty must clearly define the prohibited speech not only for the potential offender but also for the potential enforcer.

Ronald L. Buckwalter (b. 1936) US District Court Judge
ACLU, et al., v. Janet Reno, 96-963 (1996)