From TFA:
"Apple also said that the Always On VPN feature of MDM offers a fix. Mobile Device Management is over my head. […] According to Apple, MDM lets the corporate IT techies force all data leaving an iOS device to go to the company. But, MDM is is not available to consumers."There appear to be several easy-to-use MDM solutions that cater to small businesses that would also work fine for families. Apple even has one, Apple Business Essentials.
