I believe drugs should be legal because I have read studies that clearly show people go against the law to feel rebellious. Other ones have shown that in places where most drugs are legal, less people use them because doing something legal isn't fun and doesn't give people the joy they feel when going against the law.
Why should we let people kill themselves by letting them risking their own health, even cigarettes are such kind, why isn't it banned ? If something wrong isn't prevented it becomes a usual firendly warm trend in life and gets widespread in society. Society is all responsible for cancer deaths caused by cigarette.