If, in fact, heaven and hell exist - which, it seems, they do not.
Observable evidence shows no existance of a heaven or hell.. therefore, by what we can observe, there is no support of an ultimate purpose.
Kids and artists are more unconscious, but there are rules to that as well.
Now you're getting into ultimate source of motivations... digging deep down, we have no free will whatsoever, but that goes into yet another field of study, and a lengthy post as well - I believe fully we have no free will, but our lives are determined by the interaction of physical laws at levels we have no comprehension of, but even this determines no intelligent design or purpose. In fact, this removes much of purpose altogether.
Do you believe that some people need to be put in prison?
Actually, I believe prison, Death Row, fines, etc. are only crude ways at getting problems away from other people. Punishment is a means of dealing with damage after the fact; isn't it better to deter rather than punish? Or to understand the underlying causes of crime, and so eliminate them where possible?
But you asked initially about Hell - which, of course, requires a common understanding of what Hell is. Assuming the broadest semantical use of Hell, a place of eternal torment for the Damned, then no, I don't agree with Hell. And Hell is a lot different from Prison. People don't generally get paroled from Hell.
According to the Christians, Hell is pretty much a moot point anyway. Remember, Jesus is in charge down there now, and since He died for your sins, you'll never go to Hell. Nope, according to Revelations, won't the evildoer just be cast into oblivion now? No Hell anymore.
So, no, I don't believe in Hell. And I don't think people should go to prison; I think other deterents should be employed, but these deterents would require more in-depth knowledge of human behavior, and require us to put aside crude and archaic beliefs such as religion and politics and money, and require us to use extensive resources, and a lot of other things.
Practically speaking, prison works, because we aren't equipped for much else... but it's a damned shame and a terrible waste. And, as I said before, Prison is not Hell. People get out of prison - and innocent people sometimes go to prison. Your example is weak at best, son.