[Margaret Pilkington]

We know that Cannabis has some powerful qualities that mean it is of use to sufferers of the pain caused by MS and arthritis....that is why the drug Sativex(there are otherdrug company names too) was brought out - to help these people.
It does not alter the fact that it is illegal to use it unless it has been prescibed for such use.
No-one has died from using Cannabis(or that is what you tell us)...but plenty have gone on to use other illegal substance and have died from their use.....and there are those who haven't died from cannabis use, but sometimes wish they had(when in the grip of mental illness).

Illegal drugs are lumped together because they are illegal, not because they are all the same in effects.

As Anne has said this debate has gone around in circles, you are not going to be convinced that your argument is flawed....and there are many of us who are not convinced that your (or anyone else's ) argument for legalisation is anything, other than justification for your own use in the future.
My input ends here.