Cars are dangerous. Sky diving is dangerous. Walking across a busy street is dangerous.
Having just lived through one of my parents going totally and utterly mad having taken absolutely no drugs whatsoever and having seen the vast majority of my friends at some point in their life taking 'dangerous' drugs let me tell you with total and utter certainty that there is nothing at all dangerous about marijuana, ecstasy, lsd, cocaine or speed. Well certainly compared to driving a car or going out for a drinking binge.
An extremely temporary sensation of happiness or fun is nowhere near as dangerous to a person as a manic or depressive episode, the latter two being states of mind being entirely brought on by your own brain with absolutely no 'dangerous' drug being involved.
And this is even before we mention alcoholism, ocd or the plethora of other brain diseases our own bodies can inflict on us.
In order to combat illnesses of the brain, your doctor will prescribe drugs which are fundamentally more brain altering than many of your 'dangerous' drugs. My mother can barely read a sentence in a paper at the moment. Most of my friends got degrees from universities after their 'dangerous' drugs.
And the next argument that blows your utterly preposterous and medieval argument out of the water is that brain altering drugs are on sale today.
Caffeine, Alcohol, Tobacco, probably even Chocolate and Sugar. And this is before we consider the addictive drugs that are pumped into burgers, fries, milkshakes, sweets and all the dodgy fast food being sold today across the world. Oh, sorry, I mean 'food additives'. Of course they're totally safe because McDonald's paid your senator to say so.
History is the only precedent that makes them acceptable.
That anyone can be sent to prison for owning any 'dangerous' drug, especially when up to 50% of the population have at some point taken them, is an utter travesty of freedom and common sense. Worst still is that the poorer communities pay the price, locked away for ridiculous amount of years compared to the widely published and yet bizarrely low sentence celebrities arrested for drug offences.
This is a war of false morality, waged by middle class people who themselves have in all probability at some point actually taken these drugs and yet still vote with 'hard-on-drugs' politicians. They are hypocritical fools.