Facebook has urged users to enable phone number-based 2FA, but the numbers are used in a user lookup feature with no opt out and to target ads, sparking outcry (Zack Whittaker/TechCrunch)

Zack Whittaker / TechCrunch:
Facebook has urged users to enable phone number-based 2FA, but the numbers are used in a user lookup feature with no opt out and to target ads, sparking outcry  —  Users are complaining that the phone number Facebook hassled them to use to secure their account with two-factor authentication …