This document summarizes three Ontario court cases related to privacy class actions and data breaches. The first case found that the defendant's response to a data breach was exemplary and that plaintiffs failed to prove compensable damages or that identity theft was caused by the breach. The second and third cases found that failures to prevent data intrusions do not constitute the intentional tort of intrusion upon seclusion, and that vicarious liability does not apply to actions of former employees. These cases set precedents that make it difficult for plaintiffs to win privacy class actions in Ontario. The document discusses implications for data breach responses and potential alternatives to class actions for enabling justice around privacy issues.