[C]ounsel for the appellants placed considerable reliance on the fact that both of their clients had developed an addiction to drugs. Each did so at a relatively early age and each almost certainly became so enmeshed in consequence of the deprivation, abuse or disadvantage to which she had been subjected as a young person. I accept that such experiences and drug addiction itself are capable of producing serious corrosive effects that may continue to influence the conduct of the person concerned well into adulthood and from which, in some circumstances, they may never completely escape. That possibility is one which, in my opinion, must be seriously taken into account for a variety of sentencing purposes. These would include the assessment of the moral culpability of an offender with respect to the commission of a specific offence and therefore could assume relevance when considering the significance to be attributed to the notion of retribution for wrongdoing as a sentencing consideration. Of course, it does not follow that individuals who come before the court with the type of history to which I have referred do not make choices or that they cannot be held fully accountable for conduct in which they voluntarily engage or which may be the ultimate product of deliberate lifestyle choices made by them. However, and obviously, in the determination of an appropriate sentence in an individual case, regard must be had to the particular circumstances of the offender concerned. As Buchanan JA has pointed out, the background against which an offence was committed could also possess relevance when a sentencing judge came to consider the offender's prospects of rehabilitation. It may indicate the presence of a need to endeavour, through the sentencing process, to protect the public and affect the weight given to specific deterrence in the determination of an appropriate sentence.[17]