And you can also grow your own tobacco. People don't die from tobacco overdoses either. They die from a tumor in their lungs, just like marijuana smokers would too if they smoked as much as tobacco smokers. The basic differences between the two is that one gets you high and makes you retarded and anitsocial while the other gets you 'kinda high' and is addictive.

On a different note, I was a glycium addict for over 4 years. I would smoke it in a pipe and then enhance it by snorting powdered beryllium. Good stuff. But I'm clean now, I've been straight for at least 6 hours.