The girl was known to smoke pot. Her parents knew about it. Why was she smoking this legal drug if she had access to pot? All of you saying "If only pot was legal" assume she did this drug because pot was illegal. I am assuming she did it for a different high. Why do people do shrooms, lsd or heroin instead of pot? All are illegal...
Why do you think if pot was legalized that people would not use other drugs still? Other drugs that can cause more damage?
This is an example of a legal drug that caused brain damage. You don't realize that this makes a case for keeping it criminal. If legal drugs can cause this much damage, imagine how much damage it will do if we legalize them all. Do you think that there won't be an entire industry born of making new and weird drugs like spice? Or should we only legalize drugs that grow naturally?
You could reasonably legalize and regulate drugs that grow naturally, If there is either little evidence of lasting harm from those products or whatever harm in various categories is no more or less than other substances that are legal and regulated -- like ethanol products -- that sort of policy might be harmless.
If there is some various set of medical benefits, you have another increase to the "benefit" side.
But designer drugs have no history showing proof, fact, side-effects, accidents, dangerous behaviors and so on. Cannabis has a history of "known effects" and risks that go back thousands of years, and there is a general consensus that it is probably less debilitating than alcohol, or otherwise with risks that are same or lower. But with the designer drugs and bath salts, we have incidents of people streaking, stripping, smashing windows and generally flipping out.
So far, we have the social experiments of Holland, Portugal, . . . . California and so forth. We see the issues emerge over enforcement and prosecution with state laws in conflict with federal laws. We even see a confusing trend in California, with litigation over whether localities can ban or zone marijuana dispensaries.
With the new specialty of Cannabis-prescribing doctors, You can possess it, possibly cultivate it with an enhanced state-certification, and share it with your network of sufferers.
Yet that doesn't guarantee a zero risk of legal trouble for it, but keeps you at the bottom of the DEA's unfunded or null-pross enforcement list. Here, it so far seems that the Fed won't go after certain categories of users or growers, but this is simply an administrative decision, and it can change.