By Stacey Reisman, Emma Loignon-Giroux and Shalom Cumbo-Steinmetz ( August 10, 2021, 9:52 AM EDT) -- Canadian courts are developing a theory of liability in data breach class actions that depends on evidence of harm. (See Owsianik v. Equifax Canada Co., 2021 ONSC 4112 and Lamoureux c. Organisme canadien de réglementation du commerce des valeurs mobilières (OCRCVM), 2021 QCCS 1093.)...