"...you can't overdose on marijuana..."

I'm not sure about that, but I do know (from experience), that smoking marijuana and driving kills just as fast as drinking and driving. Imparment is imparment.

And, if you can get one to answer truthfully, most (all) herion (or other drug) addicts will tell you that they started with marijuana, then moved on to the big stuff. And being hooked on the hard stuff causes robberies, burgularies, prostitution, you name it, anything to get the money for another fix...