States’ Push to Protect Kids Online Could Remake the Internet

People in Louisiana who visited Pornhub in recent months were met with a surprising new demand. Before they could stream sexually explicit videos, they had to provide proof that they were at least 18.

That’s because Louisiana lawmakers had passed legislation last year requiring publishers of online material that could be “harmful to minors” to verify that their users were adults.

Louisiana is at the forefront of a sweeping national push to insulate young people from potentially harmful content by requiring certain online services to bar or limit minors on their platforms. As a...