d 22 (1965) (recogniz- ing that the threat of criminal prosecution creates the potential for a serious chill upon First Amendment rights); Hynes a Grimes Packing Co., 887 U.S. 86, 98-99, 69 S.Q. 968, 93 L.Ed. 1231 (1949) (recogniz- ing that the threat of prosecution may deny fishermen the right to earn a liveli-