Sorry, I only got up to page 6, but here's my two cents, and a little info:
Legalize cannabis, ban tobacco. Why? Well, pot is not physically addictive (though if you weak, stay away). Tobacco is. Pot actually does something for the user; tobacco does nothing but satiate the need for nicotene that WASN'T EVEN THERE BEFORE THE PERSON BECAME A SMOKER. Too bad big tobacco is good at lobbying. I think that cannabis, if legalized, should be well-regulated, with a 21+ age limit (though I don't know anyone that old that still smokes it

) and official standards for quality, purity, and safety. The government gets tax money that will help with the healthcare cost that will be there either way (people who are willing to use cannabis probably don't respect the law enough to be deterred anyways), the cannabis smokers get a safer way to light up, and organized crime loses a source of income.
P.S.: The "War on Drugs"
WILL NOT be won without massive civil-rights and privacy violations or some way of giving everyone a good life where there is no demand for mind-altering chemicals. Where there's a will, there's a way. And as long as people like substances that make them feel good, they will use them, no matter how well-informed they are about the health consequences. I go to a large high school in a rural part of New York, and you can get just about anything. Cannabis, crack/cocain, acid, shrooms... heroin, etc. There is no way to enforce the law when you have one state trooper covering for 3,200 kids who have yet to outgrow their sense of invulnerability.