Quite easily actually. Excepting truly predatory crimes (rape, murder, child molestation) society just won;t know who is a recently released prisoner. For the case of work history a false work history and adress will be generated, but only when it comes to employers, credit reports and so on. It's not hard and allows a nonviolent ex-con to reintegrate into society and be an actual benefit.
He did it intentionally, he didn't "make a mistake". Or if society sees it that way, then how can you say that any other crime wasn't a "mistake"? A 17-yr old takes machine guns into a mall and kills 423,000 people ...."Oh, geez, he just made a mistake."?
First of all I doubt even a thousand teangers armed with the latest in fully automatic firearms could lay waste to 423,000 people in a shopping mall. Your argument is purely ludicrous and an appeal to insanity.
However to answer, there is a marked difference between a rash cash register grab and actually killing 423,000 people. The cash grab is done in the blink of an eye and can be a split second decision. Murdering 423,000 people takes detailed set up and planning. A person can make a decision to do something and still have it be a mistake. Right now I would assume you see tryping 423,000 people as aHUGE mistake, but you intentionally did it.
When did society become a rahab center? Or when did prison become a rehab hospital?
Actually society has always been a rehab center. Any student of human behavior knows very well that we all a predatory animals who are savage enough to thrive in the savannah opposite lions, jackals, elephants, and so on. We are petty, jealous, thieving creatures who discovered the only way we can work together is to create a moral code we follow as a group. Society is the illusion that allows natures ultimate pradators to work toward a mutally beneficial end.
Well early on in society we discovered that there were some people who would make mistakes, slip into their predatory nature. At first we simply killed them in honor duels. Soon however we learned that then the strong do whatever, so we invented impartial laws and punishment. One of them the concept that perhaps some time of limited freedom and priviliages would teach transgressors the error of their ways.
So Soceity has always been group rehab.