So no, although I feel it is a terrible situation to go through, I cannot and will not have sympathy for these people. You made your decision, you knew the risks, yet you still did them, and now you and your family are suffering because of it. Fuck drugs.
No addict is owed forgiveness.
No 'casualties' of addiction (casualties meaning victims who have suffered not directly from addiction, but suffer indirectly from other addicts) have ANY moral obligation to forgive an addict.
Addicts that are in recovery already know this. They should know when they start apologizing to people (4th stepping) that there are people who will not accept their apology. They should know that there are people they may have hurt beyond repair, and they have to accept that.