I can appreciate that.Catechism of the Catholic Church states we do not know who--if anyone--is in hell/lake of fire.
And so my analogy with the train can't be designating a number for anyone. But I think you're suggesting that it can be a sliding scale with no stops along the route.
How about if the conductor just throws them off the train at his discretion. The god's discretion?
No, nobody can know who goes to firelake. Some of the most obvious could make a case for themselves.
Osama comes to mind first, on him defending his reputation on grounds of revenge. Or Nixon and Johnson conceivably the same!