We tried to get rid of alcohol, with the eighteenth amendment, which utterly failed. It lead to "speak easys" which were essentially illegal places that people used to drink beer. More and more people went to jail for doing things that, just a week ago, was completely legal. The same would happen for cigarettes and drugs. If people were not addicted, and didn't feel a need for these things, then I would be right with you, but unfortunately that is not the case. However, I do not feel that legalizing more drugs,is a good decision either. Finally, I feel like the best thing we can do, is try our hardest to keep the next generation away from these types of influences, because they are bad for the body.
Because the amount of money they make from the tobacco owners and users is how they afford their summer places in the Hamptons or winter getaways in Aspen. The government doesn't care what you do to yourself as long as they can tax you on it.
Because a small amount of people abuse something doesn't mean it should be kept from everybody. Most drugs have a place in medical treatment. Wine and beer have both shown that in moderation are actually healthy for you. I agree the cigarettes can go, and in the US their sales are declining.
With your logic we should ban fast food and junk food. The rate obesity would decline if we took theses away. Are you ready to give those up?
Drugs are banned and the government spends billions of dollars a year to fight them and losing. Prohibition didn't work and gave us organized crime and the mafia. Banning cigarettes would be a nightmare. There's the catastrophic loss of income for tobacco farmers and workers for the tobacco companies, the heavy loss of government revenue from taxation while they'd have to spend billions to try and police it (an impossibility, see my first sentence). So let's get real here people, when ever you try to legislate morality (personal life choices) it costs the taxpayers way too much money.