Why hasn't smoking been banned yet?

We all know the negatives of smoking, so do governments around the world. So apart from a nice steady stream of income from tax, are there any positives to smoking?

I can't think of any off the top of my head, which again brings me to question, why hasn't it been banned?

Because of the nice steady stream of income from tax the government gets off of it.

Because you touch myself at night.

>>1
Do you wanna live forever or some shit? Id rather get cancer from smoking at age 40 then live to be a 90 year old man in a wheelchair.

People should be allowed to be retarded. Do you want to ban all the retards? That's what Hitler tried to do.

Well at least smoking marijuana is illegal. Glad nobody does that.

This is what Obama the American Left wants to do here:

http://news.yahoo.com/australian-court-oks-logo-ban-cigarette-packs-004107919--finance.html