Advertisements for tobacco products should be banned because they have a negative influence on teenagers and young people in general. Tobacco products are very harmful for you and can cause many health issues in the future such as cancer. Young people are very impressionable and can be negatively influenced from tobacco advertisements.
The more that tobacco products are portrayed as "cool" in advertising and in every day life, the more likely a teen is going to experiment with smoking. Nicotine is such an addicting drug that when a teen decides to experiment with cigarettes there is a good chance they will get addicted to tobacco products for the rest of their life.