As noted above, the consequences of non-violent crimes can be just as damaging as those of violent crimes. More over, non-violent criminals can also present an immediate danger to society.  The cost of constructing a prison is outweighed by the benefit of preventing individuals from committing crimes. Rehabilitation programmes are not a panacea – they are not instantly or reliably effective. Even if an individual refuses to engage with any rehabilitative activities in prison, they are still restrained from engaging in further criminal activity.  Consider the senior members of organised criminal syndicates. These individuals may only be involved in using deceptive accounting or front-companies to conceal the activities of their colleagues, but by doing so they enable and encourage multiple violent offences.  Similarly, drug dealers may create conditions in which social deprivation and family break-down flourish. As noted both above and on side proposition, these same conditions can cause others to turn to criminality. In this instance, drugs dealers can present a danger to their communities, and an obstacle to the rehabilitation of addicts. Arguably, the most effective solution to this particular form of criminal behaviour is the removal of the dealer from that community.