On the outside, it’s a LEGO-like universe, where you can immerse yourself in a virtual brick world. But as one Taft family found, this video game, targeted at kids, could be dangerous.

You’d be forgiven for assuming that the government’s victory lap meant that it had settled details like what social media companies are in the ban, or how well the ban has to be enforced. It hasn’t.

The $55 billion deal for Redwood City-based Electronic Arts would be the biggest leveraged buyout by a private equity group ...