You will never get it under control. It will ALWAYS get easier and easier to obtain illegal drunks. Thanks to the power of the internet, within 30 minutes, I can probably anonymously buy any amount of common, or even exotic drugs from anywhere in the world, in any kind of volume (for small...
My mate spent a weekend in hospital after drinking vodka he bought from a corner shop. It wasn't vodka, it was a bootleg spirit. People have been dying doing this neknominate stuff downing pints of gin. That's legal.
Same principle.
Good idea, but it will never happen.
Also we should look into testing facilities, in clubs and the like, much like they do in Holland. Will reduce the risk of people taking a substance that is not what they thought.