On June 26, the U.S. Supreme Court unanimously struck down a Massachusetts law that restricts First Amendment activity on public sidewalks. Here is the decision in McCullen v Coakley, 12-1168. The First Circuit had upheld the law.
The decision says, “Public sidewalks occupy a special position in terms of First Amendment protection. It is no accident that public streets and sidewalks have developed as venues for the exchange of ideas.”