Well, they can't repent, which seems to be your formula for receiving God's grace. Those who cannot repent or have nothing to repent for can receive God's grace without repentance.
Being baptized is not something you "qualify" for when you are "old enough." Get real.
As for "splashing," your ignorance is pathetic. We don't splash. The Orthodox submerge three times. The Geek word to "baptize" means to submerge. We will pour water over the head if a baptismal pool is not available. But either way, water is necessary, and biblical.
As for what we believe will happen to the unbaptized babies, your ignorance is again glaringly obvious. The Orthodox firmly believe that God's mercy prevails over any judgment and trust that whatever God does is always merciful and just regardless which one of us it concerns.
Instead of learning something about Orthodoxy, you go on your preconceived notions and hearsay. I am not sure what irks you so much about Orthodoxy, but you need to look into your heart and find out. Perhaps truth hurts?