Realistically, if these are the minimum conditions to reduce this kind of low-gain amplified damage, then I suspect that most people will rapidly conclude that the cost-benefit leans in the direction of immediately severing these people from the rest of society. Since the cost to deliver a sequence of events like you describe to everyone is extraordinary (and realistically unavailable even to the richest nations today) a more feasible solution is incarceration of people for a first offense for a sufficiently long time that they are simply not present to commit the crime again.