Similar to my last post where I quoted the Pope, in this post I am going to quote, without comment, what William Lane Craig has apparently written about the Internet Infidels. In response to a Christian struggling with doubt, Craig writes:

Be on guard for Satan’s deceptions. Never lose sight of the fact that you are involved in a spiritual warfare and that there is an enemy of your soul who hates you intensely, whose goal is your destruction, and who will stop at nothing to destroy you. Which leads me to ask: why are you reading those infidel websites anyway, when you know how destructive they are to your faith? These sites are literally pornographic (evil writing) and so ought in general to be shunned. Sure, somebody has to read them and refute them; but why does it have to be you? Let somebody else, who can handle it, do it. Remember: Doubt is not just a matter of academic debate or disinterested intellectual discussion; it involves a battle for your very soul, and if Satan can use doubt to immobilize you or destroy you, then he will.

I firmly believe, and I think the Bizarro-testimonies of those who have lost their faith and apostatized bears out, that moral and spiritual lapses are the principal cause for failure to persevere rather than intellectual doubts. But intellectual doubts become a convenient and self-flattering excuse for spiritual failure because we thereby portray ourselves as such intelligent persons rather than as moral and spiritual failures. I think that the key to victorious Christian living is not to have all your questions answered — which is probably impossible in a finite lifetime — but to learn to live successfully with unanswered questions. The key is to prevent unanswered questions from becoming destructive doubts. I believe that can be done by keeping in mind the proper ground of our knowledge of Christianity’s truth and by cultivating the ministry of the Holy Spirit in our lives. (emphasis mine)

(As an aside, in that same article, Craig also mentions the role that “popular” (read: non-scholarly) apologetics for the resurrection of Jesus had on his development; he specifically mentions Josh McDowell’s, Evidence That Demands a Verdict.)
 
In another, unrelated Q&A; article regarding middle knowledge, he uses Internet Infidels in an illustration of the concept of “transworld damnation.” He writes:

I’m not suggesting that those who die in infancy all suffer from transworld damnation. Under some circumstances those who died in infancy might have grown up to become wonderful Christians; under other circumstances, they might have joined the Internet Infidels. So how could God judge them for the different things they would have done under various circumstances? (emphasis mine)