Cigarettes are addictive, yes, due to their nicotine content.  I do not disagree that a ban on alcohol (if people were to follow it) would be disadvantageous in any way -- however, as society seems to have integrated the availibity and use of alcohol into it due to centuries of use, a ban on it is only going to complicate the problem further.
        
    
Simply because they're negligible in effect does not mean they do not exist.  Your quote, in fact, supports this:  "Compared with the profound physical syndrome of alcohol or heroin withdrawal, 
marijuana-related withdrawal symptoms are mild and subtle."
        
    
They disagree.
"However, driving, occupational or household accidents may result from a distortion of time and space relationships and impaired coordination.
Stronger doses intensify reactions. The individual may experience shifting sensory imagery, rapidly fluctuating emotions, a flight of fragmentary thoughts with disturbed associations, an altered sense of self-identity, impaired memory, and a dulling of attention despite an illusion of heightened insight."
        
    
People say the same about alcohol, when it, in fact, lowers physical arousal.  A similar situation 
goes for weed:
"Occasional use of marijuana may affect sexual performance, but most abusers complain about a decrease in desire. Marijuana does reduce the number and quality of sperm and damages their mobility which may significantly affect fertility."
        
    
Takes 
at least three shots of Bacardi liquor (35% ALC) for my friend (she's 5'4", 110 lbs.) to get to a point where she doesn't feel as cold.  It takes an additional three shots for her to feel numb.  It used to take more for me (when I was drinking).
        
    
Your as bad as Raoul Duke.  Every single debate, I provide 
sources and sources on the subject, yet, each time this debate comes around, you magically forget!
        
    
Awww.  If there's one thing I can count on from advocates of legalizing pot, it's to put words in my mouth!  Good job!  Now show me where I advocated smoking cigarettes!
        
    
See my response to Compos Mentis.
        
    
Hmmph.  Pursuing an argument in semantics, I fear, will prove useless.  Chalk this particular argument up to a stalemate.
        
    
Here, I'll make a deal with you:  
you come up with a reliable, cost-efficient replacement for combustion engines, and I'll ease up a tiny bit on cigarettes.  Otherwise, excuse me for not wanting to run the 100 miles to home whenver I go home for the weekend, or to want to have to hitch Bessie up to the covered wagon.