In reguards to smoking if that put that they smoke at all, then it means they smoke all the time....
Drinking the same goes for that,,, people are lying so they don't sound like they are a chimney or a lush....well this is the case for about 95% of the people....
Also if it is a young person(guys mostly) they may put down party every night or something, and they probably have no friends and rarely drink.
But with older people they may list social drinker and be a complete drunk... People put down what they feel would attract the types of people that they like, not who they are.... There are some exception, me being one of them, cause I can give 2 shits how other's veiw me...