Iacchus said:
Weak? No. If we understood that prison was the closest thing to hell on earth -- or, at least "why" we have prisons -- then perhaps we could better understand what the nature of hell is.
Prison is not the closest thing to Hell on Earth, first of all. I can think of plenty of things that could fall to that definition before prison.
Hell is one of two things; either absolute anguish for eternity, which can be equated to the physical pain of being burned...
or
Eternity of knowing who God is and not being in His presence.
Now, assuming your ridiculous analogy is trying to draw a parallel between the reason behind Hell's existence and prison, we need to define what the reason for prison is (an entire argument in itself).
I'll make some assumptions here and firstly say it is primarily to remove people from the greater population who have been declared as potentially dangerous (based on your earlier comment).
How can you be of danger to another entity in Heaven? God is omnipotent and he can simply prevent that without the need for Hell.
Ok, let's make another assumption and see Hell (as prison) as having the purpose of social rehabiliation.
Rehab'? There is no getting out of Hell, so what's the point?
Hmm...let's try the reason for Hell (as prison) is as a form of punishment to disuade people from breaking rules. Hey, we're getting somewhere here. But this gets us back to our original conundrum (which was the reason you postulated this prison analogy) that God is basically establishing rules (the top rule being 'Not believing in Me will land you in Jail, a place you don't believe in anyway) and creating a bias towards breaking them in man, knowing that with Free Will some of his 'loved' creations will not believe in Hell's existence...
...and therefore it is a moot point whether it is there as disincentive to not sin or not.
Therefore, again, Hell is a paradox.
Athon