Addiction is enslavement. In the depths of addiction, a person will disregard their typical morality and do anything to pay for their next fix.
I think we should do whatever we can to free them from their bond; no need to further criminalize/punish them just for being addicts.
But as long as they're choosing to remain enslaved by their drug, especially if treatment is offered and not taken, I think they deserve the stigma of an inferior segment of society.
Decriminalize, don't normalize...