3 [53 L.Ed.2d at p. 835].) The United States Supreme Court has stated the principle in [39 Cal.3d 625] broad terms: The government may ban forms of communication more likely to deceive the public than to inform it [citations] or commercial speech related to illegal activity. [Citation.] (Central Hudson Gas & Electric Corp. v. Public Service Commission of New York (1980) 447 U.S. 557 at pp. 563-5