Medical marijuana

Here's some food for thought. Death rankings of drugs and alcohol:
1. Alcohol
2. Pharmaceutical Drugs(Pain, anti depressants....)
3. Cigarettes
4. Heroine
5. Crack/Cocaine
Marijuana= 0 documented deaths in the history of it

Anybody see the problem with this list?

Number of hours wasted doing nothing by stoner's after smoking a bowl
850,000,000,000,000,000,000,000,000,000 and counting