Look, here's my *official* statement on what the Oracle thinks on drugs, so I don't have to keep repeating it!
Some drugs are harmless. Some drugs are not. The latter includes meth, cocaine, heroin, and all those other lovely assorted flavors. Addiction isn't good, because you CAN'T just stop any time you want, that's a part of your brain specifically designed to be in denial BEING in denial. It is long and it is hard and it is sometimes very painful- just ask my father, who used to use cigarettes. Meth, in particular, is a prime example- there are DOZENS of negative side effects, it's extremely addictive, it's extremely expensive, and the high is short-lived anyway, just like any other drug, so it's not worth it!
Drugs like salvia and marijuana....well, here's where we're getting into thorny territory. I think that there's ample evidence that marijuana CAN in select cases be used to treat illnesses and diseases. But that doesn't mean I endorse using it, nor does that mean I even think it should be legal. The courts and the law decide what's legal, and regardless of your position on pot or salvia or something equally minor, the former is illegal and salvia use is frowned upon.
Salvia, I believe, is legal. So if you're into shamanism or you'd just like to look at all the pretty colors or whatever reason, you CAN do it. But if you absolutely have to for the love of God do it indoors, and not in a car or somewhere where you could injure someone.
Just be smart, be safe, follow the laws, and if Drug X IS completely legal and you absolutely HAVE to get your fix, go ahead, but DO IT INDOORS where you can't harm yourself, or anyone else.
And that's the Word.