There's so much wrong with this.
First off, making it illegal is what makes it possible for drug lords to exist. Remember what happened during the Prohibition era. If you make something illegal, you're only going to make it a more dangerous market for the product.
Speaking of the Prohibition era, the Constitution was amended to ban the selling of alcohol, and then amended again when it proved to not work. When the "War on Drugs" was started back then, no amendments. So doesn't that mean the ban on certain drugs is unconstitutional and even illegal?
People who want to get high are going to get high somehow. You're not going to stop them no matter how hard you try. The best you can do is teach them about the substance and the pros and cons (in equal measure). Then they'll make their own decisions about what is best for them.