While I see valid points in many of the arguments here, even/maybe even especially Busty's, I am an advocate for heroin to be legalised. Heroin and meth are vastly different in my opinion, if you are just basing your views on addictiveness, then surely we should ban, or criminalize nicotine and alcohol as well. Surely. No, this has been tried, and it failed dismally, much like the current state of affairs.
If you look at these two drugs in particular, heroin and methamphetamine, which of the two are more damaging to long term users. No, scratch that. Which of the two are damaging to long term users? If you consider heroin to be damaging long term, apart from the obvious addiction itself, then you should send all those doctors like Busty to jail for prescribing morphine, oxycodone, fentanyl, codeine, buprenorphine, methadone, whatever. It's not the substance that causes damage in the case of the opiods, it's the fact they're illegal, they're cut with shit and because of their expense, people often neglect themselves, and as Busty likes to mention, their families. That could change if it was legal, prescribed and cheap.
Meth, no. It could not happen. It's not just that it's addictive. It also causes enormous physical and mental issues.