European regulators slapped TikTok with a $368-million fine on Friday for failing to protect children’s privacy, the first time that the popular short video-sharing app has been punished for breaching Europe’s strict data privacy rules. Ireland’s Data Protection Commission, the lead privacy regulator for Big Tech companies whose European headquarters are largely in Dublin, said it was fining TikTok €345-million and reprimanding the platform for the violations dating to the second half of 2020. The investigation found that the sign-up process for teen users resulted in settings that made their accounts public by default, allowing anyone to view and comment...