Americans' views on marijuana are complex. While majorities say marijuana should not be legalized, they are somewhat divided on whether possession of a small amount should be considered a crime. And most Americans say they approve of using the drug for medicinal purposes when prescribed by a doctor. About three in 10 people say they have tried marijuana and a majority of parents who have tried it say they would tell their kids if they asked. On the other hand, three-quarters of parents say they would be "extremely" upset if their child smoked marijuana and half say they would be more concerned about pot than cigarettes or alcohol.