There are people who live in despotic regimes around the world, where having the wrong political opinion, the wrong religion, or loving the wrong person can get you locked up or worse. Access to the web gives them light.
We know, of course, what he has in mind: China, Russia, Middle East, parts of Africa or Latin America...
And yet, in the wonderful and free Western world, having the wrong political opinion (Holocaust denial, expression of support for Muslim terrorist organizations), the wrong religion ("illiberal" values) or loving the wrong person (younger than the age of consent) can also get a person in all sorts of troubles, up to being locked up. Don't know if access to the web gives these people light as well.