Wow
the legalisation of drugs isn't an easy topic to cover, because of the sheer number of drugs and their differing effects. This should more properly be debate on a single drug, and whether or not it should be legalised :
People for the legalisation of illicit drugs need to understand there is more at stake than ?'it doesn't negatively effect the individual taking it'
What if a specific drug effects different people differently (ie one it has little to no obvious effect on <medium> and another it has an obvious effect on <medium>), with no way to tell until you've taken the drug?
A number of drugs actually exhibit such behaviours .
A so called ?'soft drug' like Marijiuana has it's down side. Here is a link to a very reputable science magazine :
http://www.newscientist.com/channel/being-human/drugs-alcohol;jsessionid=OPNJHHGAPKJM
That's their drugs and alcohol page. Most people's doubts about research will arise from ?'but their research is paid for by the government, so they support the govt line'. If you look at the New Scientist link, you will see that they are publishing pro & con articles on drugs.
Not included in the page, because it is too old (It was published about two years ago if I remember right) was a link stating that there is that a UK research team had found chemical in the brain required for people to think rationally (sorry, can't remember the name, was a while back). Schizophrenics naturally have a lower level of this chemical. People who are ?'prone to schizophrenia' have a lower than ?'normal' level of this chemical. Smoking marijuana lowers the level of this chemical and triggers Schizophrenia.
Here is another link to the effects, which I found after a very quick search, but don't quote me on it's reputableness :
http://www.ctclearinghouse.org/topics/customer-files/Learn-About-Alcohol-Tobacco-and-Other-Drugs.pdf
Marijuana - At my last workplace, I knew a guy who smoked marijuana every day of his life (he was early thirties when last I saw him). He could talk about everything and everything with a greater knowledge than most people (well read with good memory retention). So the issue of marijuana is obviously not simple. I've also personally met numerous kids, and their parents. In the case of two particular brothers, the eldest didn't start having mental health issues until he touched marijuana. His youngest brother was fine - until about a year and a half later he too started taking marijuana. I've run into their friends who describe them as having ?'psychotic episodes'. Both the parents are normal.
LSD is known to cause ?'flash backs' in some people, years after the drug was last taken.
Heroin - anyone who knows anything about heroin, knows that for some people, it's almost impossible to give up, and so children are born addicted to heroin.
Cocaine - I have a good friend who took it over a long period of time (about 6-8 months a few years back). Over time she started becoming more testy, her stress levels rose through the roof, and she was snapping at everyone. This wasn't because of her job - as soon as she stopped she started becoming normal again, and she admitted that she never knew just how bad she had become.
The same friend of mine who used cocaine, has regularly used ecstacy at dance parties. I don't see any medium term effects on her from this drug.
For drugs in general - their dangers :
Because of the lack of drug driving tests, surveys in Queensland Australia revealed as many as one in three young adults (the group most susceptible to drugs) have driven at least once whilst under the influence of an illicit drug.
Studies have shown (again, older studies published on NewScientist) that there are genes in the body that cause people greater pleasure when they drink alcohol or take drugs. In other words, these people get addicted easier, and the research backs it. It also helps explains why some people can be addicted from almost the first hit, and others can use casually for a short while, then walk away.
The mix of genetics (this is opinion only) seems to be the cause for the major differences in effects of drugs on people. This opinion is probably backed by the fact that doctors/psychiatrists proscribe medicines until they find one that works "because everybody is different' (ie. What works for one person with the same illness as another, may not work for the other)
Other effects of certain drugs include a reduction in motivation to work. This costs the country in terms of GDP, yet the same amount of tax per person is needed. So when you have millions of unmotivated people, the more productive ones (ie the ones not on drugs that diminish work performance) are in effect paying extra to support those on said drugs.
When you legalise a drug, can there be any doubt (look at place that has fully legalised Cannabis - Alaska if I remember right, in the US) that more people become addicted to the drug? And if a higher percentage are addicted to the work performance degrading drug, then a the ?'more productive' members of society are paying even more to uphold the ?'less productive' members (I use those terms loosely, for they will not always be accurate - it is a generalisation)
Futher, the more addicts of hard drugs, the more support workers are needed to support the addicts (the more drop in points, supply centres, detox centres for when they want to quit, the more methodone centres, the more social workers/police to cater for the associated domestic violence/mental health issues, the more workers to support the workers <this>, the more family counsellors for parents who don't know how to deal with their addicted children, the more divorces from the involved stress of addicted children, the more addicts driving around in cars (leading to more accidents, maiming injuries, deaths etc, and not just of the drivers)
Uh, I'd better stop, there's too much to write on this subject.