ConAgra Grocery Products Co. v. California

(1) Whether imposing massive and retroactive "public nuisance" liability without requiring proof that the defendant"s nearly century-old conduct caused any individual plaintiff any injury violates the due process clause; and (2) whether retroactively imposing massive liability based on a defendant"s nearly century-old promotion of its then-lawful products without requiring proof of reliance thereon or injury therefrom violates the First Amendment.