Whether a legally recognized privacy interest exists is a question of law subject to de novo review?

Whether a legally recognized privacy interest exists is a question of law subject to de novo review. (See Hill v. NCAA, supra, 7 Cal.4th at p. 40.) Whether the plaintiff has a reasonable expectation of privacy under the circumstances and whether a defendant's conduct is a sufficiently serious invasion of the right to find a violation are mixed questions of law and fact. (Ibid.) If undisputed material facts show no reasonable expectation of privacy or only an insubstantial impact on privacy interests, these issues may also be decided as questions of law. (Ibid.)