Re: If it was possible to rehabilitate criminals with one pill.......................
The way the hypothetical was described it sounds like the magic pill works with 100% efficacy on a single dose. That is obviously very important in determining the answer to the question.
I say "Yes, release them" for the following reasons.
Based on the "hypothetical", the existence of the magic pill would be unequivocal proof that the criminalty was caused by a disease. Thus the criminal is not responsible for their behavior and vengence is unwarranted.
First, you must consider disease-based criminality a mental illness, and since the only time treatment fro mental illness is madatory is when a person is a threat to themselves or others, the pill would become mandatory treatment for anyone with the criminality disease.
This means that the pill would be required for all potential criminals (based only on the premises set forth by this hypothetical situation) so there actually is 0 chance of the "pill release" causing criminality in this hypothetical situation (since it is already proven that criminality is a "disease" and thus consequences would have no bearing on criminal behavior).
If the criminality is 100% caused by a disease that was beyond the criminals control, there is no purpose to continued "punishment" because the person was definitively not responsible for their behavior (again, this would absolutely have to be true in this hypothetical situation for the situation to even be hypothetically possible, nor would they be capable of commiting the same behavior after treatment.
The interesting aspect of this debate is that since the construct creates the situation that people are not truly responsible for their actions, the incarceration of people could never bring about rehabilitation anyway. So there should never have been a release date set to begin with as the person who is incarcerated is guaranteed to be biologically predisposed to recidivism.
Whereas, in reality, the fact that incarceration and punishment can actuallly lead to rehabilitation proves that in reality, a magic pill can never exist because criminality is not a disease (except in very, very rare cases).
Now as to why these ex-criminals should be released, we need to address the reasons for incarceration:
There are two ONLY real (i.e. non-emotionally based) goals of incarceration and both as a detterant:
1. As a detterent of current crime by removing criminals from a postion where they can commit crimes
2. As a detterent for future crime (this can be recidivist crime, or potential crime form a person who fears incarceration/punishment)
These two reasons are the only reasons for incarcerating people. All other punishments that do not include removal from the general population are focused on goal two only.
Vengence for the victim/families is not a valid reason for punishment. If it were, the victim or their family would actually decide or bring about the actual punishment (direct vengence). If it were, there could be no punishment for crimes that are considered antisocial in nature without having a true, definable "victim" (prostitution, tax evasion, speeding, money laundering, etc).
If "vengence" were the primary goal of punishment, these "crimes" would be unpunishable.
The reason that the primary goal of punishment is that of a deterrant is far more important than that of vengence. It is the truly noble goal of preventing future victims.
If the prevention of future victims is assured by the existence of this pill (as described by the construct), then continued incarceration is pointelss since it will only act as a waste of tax dollars in order to satisfy a need for vengence. Even further, in this hypothetical situation, none of the "criminals" is truly responsible for their actions and thus any vengence would be against an innocent "victim" of an illness. (Hey, I'm not the guy who created the screwed up hypothetical.)
If reality were this easy, then we wouldn't need any vengence because ALL crime would be 100% preventable because all crime comes from a disease. In reality crime is not a disease, so the same logic does not apply.
Even crimes that are caused by diseases like schizophrenia are not curable from a one-time dose of medicine. Often times the people with these diseases stop taking their meds and are therefore full-on threats to society again.
So basically, creating this construct in order to wander off on a childish tirade against incorrectly perceived enemies is asanine.