Reliable detection of Win98 may not be possible. People very rarely start to smoke once they are adults.
Most people say they start smoking because of social reasons.
One of those reasons is to try to make themselves look older. Some kids may think that smoking or chewing tobacco makes them look more hip or glamorous, like a movie star or a famous baseball player. Actually, smoking does make you appear older if stained teeth and wrinkled skin are the look you're going for. Another reason some kids start using tobacco is to seem cool in front of their friends. Only half of all 8th graders know how poisonous and dangerous tobacco is.