Let's jump right to it with a concrete example:

A human being is put in absolute quarantine the very second it is born. During its entire lifespan it will have no interference with anyone or anything apart from its supplied provision. It will never be able to commit a sin apart from its ability to worship itself or to create bonds with deities that are created by him-/herself (which is highly unlikely given its isolation). On the other hand though, it will never be able to commit any "good" actions either as there is no way it could ever care for, or love anyone but itself.

And now the question to ponder: Would this human being go to heaven, as God feel sorry for it and is aware that there was no way it could do anything about its situation, or would it go straight to hell since it completely lack faith in God and never worshipped him in any sort of way? As I see it:

- If it ends up in heaven, we have just found a way of assuring someone a place next to God once they die.

- If it ends up in hell (due to a lack of faith and/or selfless actions), God evidently has no mercy for the unfortunate.

Because those two are the only options, right?

(I'm obviously not religious myself, but those who are should find this question interesting to discuss.)

I'm only going to answer your poll: No, I do not believe in god.

This is my personal take on the matter, and not a assault on anyone's belief.

What the...!?. He would go to heaven because the god would know that isn't his fault and would forgive him plus he didn't do anything bad.

Now a human being that lives separated from any foreing contact since it's born would be just a blank being that isn't even aware that he's alive, he will never know nothing about anything, and just act by instinct, learning could come with that but since he's isolated from everything... it would never develop feelings, or the ability to reason since all of that comes with learning from everything that is around you. It would just sit there, feed and sleep until the day of his death, therefore he would still go to heaven because again he didn't do anything bad.

So, if we put all future offsprings in similar quarantines they would all go to heaven?

Sounds to me like we just beat God.

God can read his heart and decide wether he should go to Heaven, Hell or be annihilated.

So, his final destination was determined the second he was born?

That I do not know because I am undecided wether there exists free will or if everything is predetermined. But I think your example doesn't necessitate either. If we assume there exists free will, it could be that the guy in the cage only very late in his life made a decision that God judged as rightful.

Now you may ask, what decision? I have a hard time describing it but simply put, you don't have to be put in a real life situation to prove you make the right choice in a given situation (I don't have to have a drowning baby and drowning murderer in front of me to decide whom I would to save, and I don't even have to make the conscious thought in my mind, God knows what I would decide even better than I do).

There is a strand of thought called predestination in which, if one believes in the omni-qualities of God, it is conceivable that our fate is predetermined from the second we are born as he knows of every action that we will take in our lives. It's one of the many issues that come from the attributes that have been assigned to a Christian God, but it's interesting ti think about nonetheless. 

Yeah, I have heard about that too, and it seems that this thread has ended up in a similar manner to my other one: The only way for God to be undefeated is if everything is predetermined (but even then you cannot blame someone for commiting a sin...), otherwise we have just found the key to heaven.

I really don't think you've found the key to heaven in locking children up until they die. Way too speculative.