Whether Louisiana's catchall disturbing-the-peace provision could be understood to criminalize the students' peaceful sit-ins without evidence of conduct likely to disturb or alarm the public.
Holding
No. Under the Louisiana statute, properly understood, the State needed evidence that the conduct was at least foreseeably likely to disturb or alarm the public; the students' quiet presence at a segregated counter did not itself satisfy that requirement.
Reasoning
The Court began with Louisiana law. The statute required conduct carried out in a manner that would “foreseeably disturb or alarm the public.” Its specific subsections covered fighting, loud or insulting language, intoxication, violent group conduct, unlawful assemblies, and interruptions of assemblies. Read in that setting, the catchall provision naturally reached other forms of violent, boisterous, or outwardly disruptive conduct.
Louisiana precedent also supported a narrow reading. In State v. Sanford, the Louisiana Supreme Court had reversed breach-of-the-peace convictions of Jehovah's Witnesses who peacefully distributed religious literature despite officials' prediction that their activities might provoke trouble. That decision indicated that peaceful conduct, even if it offended some members of the public, was not enough without outwardly unruly behavior or a real basis to predict a disturbance.
The Court allowed for the State's broader theory: perhaps Louisiana could treat peaceful conduct as disturbing the peace if it created an imminent risk of public commotion. But even under that more favorable construction for the State, the prosecution still had to produce evidence that the particular sit-ins were likely to cause such a disturbance.