Evil Drugs I disagree
First of all, I feel you should be targeting harder drugs such as cocaine, meth, heroin, or ecstasy(it can be pretty dodgy). All drugs have potential for abuse, and cannabis and alcohol are no exceptions.
However, there is such a thing as responsible drug use. It is possible to lead a full and happy life with responsible use of cannabis and alcohol, as long as one does not drive while intoxicated, and does not overdo it. Cannabis has never hurt a soul (except for the lives ruined because of its Prohibition).
If you want to live a drug-free lifestyle, that is your choice. As a matter of fact I applaud you. However, you should not judge people who choose different paths. They are well aware of the risks they take. Let them live their own lives.
Anyway, that's my two cents.