Potter Stewart

“ The ordinance before us makes a crime out of what under the Constitution cannot be a crime. It is aimed directly at activity protected by the Constitution. We need not lament that we do not have before us the details of the conduct found to be annoying. It is the ordinance on its face that sets the standard of conduct and warns against transgression. The details of the offense could no more serve to validate this ordinance than could the details of an offense charged under an ordinance suspending unconditionally the right of assembly and free speech. ”

“ Conduct that annoys some people does not annoy others. Thus, the ordinance is vague, not in the sense that it requires a person to conform his conduct to an imprecise but comprehensible normative standard, but rather in the sense that no standard of conduct is specified at all. ”

“ It is said that the ordinance is broad enough to encompass many types of conduct clearly within the city's constitutional power to prohibit. And so, indeed, it is. The city is free to prevent people from blocking sidewalks, obstructing traffic, littering streets, committing assaults, or engaging in countless other forms of antisocial conduct. It can do so through the enactment and enforcement of ordinances directed with reasonable specificity toward the conduct to be prohibited. ”