It IS a problem of alcohol. Drinking excessive amounts of coke, water, juice or whatever doesn't affect your state of mind at all. Only alcoholic drinks do. You're really understating the amount of drinks you have to take to get to the stage of tipsy, at which point your mind is already slightly affected and the road to more shots or glasses already became a lot easier. That's one of the problems, alcohol consumption easily snowballs (so does smoking though). There's a reason why you get fined for drunk driving even if you just consumed a beer or 2-3. Your mind is already affected at that point, however slightly.
If a smoker separates him/herself from others and consumes the cigarette away from others, all the health risks are his/hers. If an alcoholic would do the same thing, i.e. walk outside the lounge/bar and drink and then go back in, the effects of alcohol can get that person into fights, can cause him/her to step in a car while drunk and all kinds of other shit. I am 100% positive alcohol has killed more people than regular smoking, when we're talking about the people who didn't actually consume it and just happened to be near the person who did. You can blame it all on the person who is drinking the alcohol, but the same person consuming cigarettes instead of alcohol wouldn't get into a fight or drive someone to death... at least not directly influenced by his/her consumption of cigarettes, while with alcohol this WOULD be the case.
I'm not saying alcohol should be banned, but at the very least it deserves the same stigma that smoking has received (no commercials, and warning labels).