The decision is Joffe v. Google. From the introduction:
In the course of capturing its Street View photographs, Google collected data from unencrypted Wi-Fi networks. Google publicly apologized, but plaintiffs brought suit under federal and state law, including the Wiretap Act, 18 U.S.C. § 2511. Google argues that its data collection did not violate the Act because data transmitted over a Wi-Fi network is an “electronic communication” that is “readily accessible to the general public” and exempt under the Act. 18 U.S.C. § 2511(2)(g)(i). The district court rejected Google’s argument. In re Google Inc. St. View Elec. Commc’n Litig., 794 F. Supp. 2d 1067, 1073–84 (N.D. Cal. 2011). We affirm.