IMHO you should not even suggest there is a "right" way to use meth. If you do you're basically advocating for drug use.
There is no right way to do drugs. Don't do drugs kids, period.
By the way I am about 99% sure that the main reason behind drug abuse epidemics, drug-induced degradation and deaths is lack of relevant education (the real kind, not just the scary "don't use drugs" stuff), lack of understanding and support. NO SUBJECT EVER should be made unspeakable. The more serious a problem is - the harder we are to try to actually understand it and everything relevant to it thoroughly and educate everybody to understand that. Imagine we would just teach kids not to use electricity / not to friend with those who use it and scare them about electrical shocks instead of telling them they should use it with their hands dry.
Common sense, perhaps?
By showing the countless cases of success of drugs like Penicillin?
In regards to ignorance, if your view of drug use comes from the popular media then it looks irredeemable. If you have no personal experience of people you know who have tried or recreationally used different drugs you will be seduced by the notion that "there's no right way to do drugs". Indeed, not long ago it might have even be easy to hold the same opinion about marijuana.
The reality is that while some drugs hold the potential to wreck lives, few drugs are worse than those we already grapple with and accept into mainstream culture: tobacco and alcohol. Just as with alcohol it is possible for other drugs to ruin lives, but just as with alcohol many drugs can be used without doing so.