I've got a stoner buddy of mine who is 58, has emphasema, and has never smoked tobacco in his life.
None of that contradicts philman's point: 'Marijuana isn't "deadly", but it is psychologically, not physically, addicting and can be used or abused like any other drug. Alcohol and nicotine are physically addicting and can be "deadly", depending on many factors.'
I won't even go into other issues like pot related driving fatalities
There are many alcohol related driving fatalities; should we ban alcohol?
or homes burnt down because someone dozed off while tokin' his doobie...
Homes have burnt down because someone dozed off while smoking a cigarette; should we ban tobacco?
Heck, asprin can be "deadly."
Salt can be "deadly."
Difference is if I take an aspirin and get behind the wheel of a car, I am no more likely to cause an accident than if I hadn't taken the aspirin. Same cannot be said for smoking a joint or having a drink.
I reassert my position that it is reasonable for society to restrict or prohibit the use of products for the safety or it members. While it may appear arbitrary that alcohol is legal, but marijuana is not, such distinctions are based on historical use and cultural norms.