Vidal has made some excellence arguments for the legalization of all drugs, and the lowering of their prices dramatically. It is somewhat of an anarchist or republican point of view to argue that we as mankind should be able to do as we please without infringing on other's liberties, without law to tell us otherwise, but I do agree with the premise. We should all be capable of making our life's decisions by ourselves. We know that drug-related crime is all based solely on the acquisition of the drugs the vast majority of the time, in order to steal them, steal money to buy them, or take them forcefully from others. With Vidal's arrangements, there would be no need to hurt and steal, as the drugs would be legal and very cheap, foregoing the need to get large sums of money to feed the addiction.
        The implicit assumption isn't very easy to believe, because of statistics that say "26%  of Federal prisoners said they had committed their current offense while under the influence of drugs", and the occasional horror stories of atrocities committed while under the influence. I think that they are threats to their neighbors just because the drugs can affect their judgement, and something like a governmental tracking system to keep track of users and more readily available protective services would be required in order to keep everyone safe. The system overall wouldn't be effective because the few who would go ahead and use the drugs would be hazards to all of us choosing not to participate in the usage. Drug-abusers are always threats to themselves and others, and therefore have no place in a society.