The author of this article died in 1998, he has already been judged by God, and has answered for his title. I am not defending his title here, however having been in the advertising business, he might have thought this title would move non-catholics into reading his article, and if they read it, it would certainly give them food for thought. As I said, I am not defending what he did but trying to understand why he titled it that way.
If he titled it: No Salvation Outside the Church, I doubt even the Dimond bros. would have read it. Think about it, even Catholics would have been thinking ... another article about EENS, and just skip it. In fact if it had been titled any other way, it would have never even been brought up here in the first place on CathInfo., is my guess.
This is a good article, and if I were a non-Catholic in the Eyes of God, I would certainly think hard on this article. It also gives a history about Fr. Feeney which is also an eye opener.