By the end of this month, porn will get a lot harder to watch in Texas. Instead of clicking a button or entering a date of birth to access Pornhub and other adult sites, users will need to provide photos of their official government-issued ID or use a third-party service to verify their age. It’s the result of a new law passed earlier this summer intended to prevent kids from seeing porn online. But it’s also part of a broad — and worrying — attempt to age-gate the internet. Texas may be the biggest state rolling out anti-porn rules, but...