This article reports a random telephone survey of Evanston, Illinois, residents in the spring of 1978 probing knowledge of legal sanctions, perceptions of the certainty of their imposition, feelings about their legitimacy, and approval of peers for violating the law. It focuses on traffic offenses, marijuana smoking, and shoplifting and uses self‐reports of actual or potential violations. The data indicate that knowledge of the severity of legal sanctions and perceptions of the certainty of their imposition are not related to imputed violation; feelings that the law is legitimate and that peers disapprove of violations are related to imputed violatio