Plain and simple, tobacco is a money-suck. A single pack of cigarettes is another two candy bars you can’t enjoy. Four dollars for a single tin of chew, is that a price you’re willing to pay? For someone who is addicted, the money could add up fast. Two, four, six, eight, even 10 packs a week? Tobacco is costly; it will cost you.

On the government side of the question "Should tobacco be illegal and why?", there is a history. This history is not of tobacco, but of another potentially harmful substance. The United States government outlawed alcohol in the 1920's. The prohibition was intended to reduce crime rate, but in reality all it did increase crime rate. People who are addicted to a harmful substance will use it whether the government declares it illegal or not. Someone who chews tobacco or smokes tobacco or uses tobacco in any other way will continue to use that product, even if it is announced illegal.
http://www.con-suming.com/Tobacco/should_tobacco_be_legal.htm

Looking at the influence of tobacco on the health of a society can be very alarming. People who use tobacco for smoking and chewing can not only harm themselves but others as well. Second-hand smoking is probably the most well known form of harming a community through one person’s actions. Being in the same room as someone who smokes a pack of cigarettes is the same as if you yourself were smoking 1-2 cigarettes. The effects of one person smoking can be felt through out an entire community. Chew can also cause problems in society. People who spit chew on the sidewalks could unintentionally cause pets to become very ill, if the pets were to lick the chew.
http://www.progressiveu.org/102737-tobacco-should-be-illegal

When I researched the effect of tobacco on one’s personal health, I found a quite thought-provoking video. A young man filmed his mother who had smoked and been diagnosed with lung cancer. Tobacco contains many deadly substances, such as ammonia, cyanide, DDT, arsenic, and 200 other fatally poisonous substances. Lung cancer, rotten teeth, increased physical aging, and many other horrible things can result from smoking. Chewing tobacco is not any better. Your teeth will rot, and you will eventually develop diseases on your tongue, the roof of your mouth, and the inside of your cheeks if you chew tobacco rather than smoke tobacco.
http://article.wn.com/view/2009/04/23/Should_tobacco_be_banned/

Tobacco is a terrible substance. It is enjoyable to some people, but in the end it will destroy those who use and abuse it. Should tobacco be illegalized? No. Making tobacco illegal could create a idealistic society, on the condition that everyone was willing to abide by the law. Like I mentioned earlier, outlawing tobacco would just be repeating history. It’s a great idea, but it won’t work. It will cause more problems than it would solve. Now people who are addicted legally would be illegally addicted and if they were caught satisfying that person’s addiction, then the law would have to deal with that person. Tobacco should not be made illegal. It will backfire.