The Mets might not be selling out Citi Field, but the Orthodox Jewsdid. Just a few days ago, more than 40,000 Orthodox Jewish men and boys filled the stadium for a gathering intended to consider the dangers of the Internet - dangers to their souls.

That gathering is just one indicator of the concerns many people have about the Internet. Like the Orthodox Jews at Citi Field, most evangelical Christians see real and present dangers on the Internet, ranging from pornography to a loss of authentic communication and human relatedness. Thanks to the Internet, a toxic...