The problem with this, in my view, is that it makes hell the default unless you act otherwise. I think Orthodoxy presumes the opposite, and only when a person begins to sin is he cut off from God.
My understanding is if the person was not capable of sinning (such as an unborn infant), they are blameless and not separated from God. Christ commanded us to become like children, so for that reason alone I cannot fathom that a child could be anywhere but in the bosom of Abraham.
Some texts from the funeral service for infants may be enlightening here:
Prayer: O Lord Who watches over children in the present life and in the world to come because of their simplicity and innocence of mind, abundantly satisfying them with a place in Abraham's bosom, bringing them to live in radiantly shining places where the spirits of the righteous dwell; receive in peace the soul of Your little servant (Name), for You Yourself have said: "Let the little children come to Me, for of such is the Kingdom of Heaven."
The Gospel: At that time, they were bringing even infants to him, that he might touch them; and when the disciples saw it, they rebuked them. But Jesus called them to him, saying, "Let the children come to me, and do not hinder them; for to such belongs the kingdom of God. Truly I say to you, whoever does not receive the kingdom of God like a child shall not enter it." Those who heard it said, "Then who can be saved?" But he said, "What is impossible with men is possible with God."
Troparia: Who would not lament for you, my child, as your end journey begins from this world to another home? For while still a little child, all too soon from your mother's arms, as might a birdling on speeding wing upborne, are you departed to Him that made all things. O child, who from lament could refrain when he beholds your lovely face, which was like a gladsome rose, now fading fast away?
Who would not with groaning sighs, my child, and floods of clamorous tears mourn the wealth of your comeliness and the beauty shining forth from the innocence of your heart? For like a caravel which leaves no wake behind, so are you vanished, and from my eyes are sped. Come, my beloved friends, kinsfolk, neighbors, now draw nigh to join with me in the kiss of last farewell, and bear him (her) to his (her) grave.
http://www.goarch.org/chapel/liturgical_texts/infant_funeral(Note that for young children, the litany for the departed is not even said. That should be telling.)
