I'm all for libertarian society, but I don't see psychedelics as something that everyone should have access to. In the same way as the strength of alcohol is managed & age restrictions enplaced, Psychedelic drugs could be used by those with experience & a licence, much like a driver. Or a race driver, where different licences allow the driver to move up into faster, bigger vehicles as his prowess improves.
Legalising Psychedelic drugs does not mean that these drugs are suddenly available on every street corner. Well, weed maybe but nothing else! Psychedelic drugs would be tightly regulated if we ever got to this point, I reckon.
What we need is legislation that permits safe, constructive drugs use by sensible grown-ups & a system that helps people who develop problem usage. Ideally, we'd have a similar situation to the RC scene we have now, where clued up individuals can purchase products & have them delivered & the only difference would be that 1) One would be able to purchase Psilocybin, LSD, MDMA, amphetamine etc (presently banned drugs would appear alongside RC's in other words) 2) No-one would be prosecuted for possession of Psychedelic Drugs or in a perfect world, any drug.
I think the idea is that government should move away from moral interference in personal freedoms & focus law enforcement entirely on violent & invasive crime.