Facebook, Big Tech Hedge Privacy Risks in Online Support Groups

An oncologist with a rare form of cancer and an attorney seeking help for his disabled son both rely on social media platforms to connect to others suffering heartache and seeking answers in tough times. They find help in Facebook Inc.'s health support groups, being part of a global network connecting millions in need of resources and reassurance.

But the social media giant is limiting its liability in the event a third party leaks health support seekers’ personal information or posts it without their permission. As Facebook and other companies expand into the digital health world, they’re passing the legal ...