This randomized experiment evaluates the attitudes and behavioral intentions of 458 undergraduate college students about intervening with the intent of preventing an illegal retail purchase of tobacco products by a minor after exposure to a factorial combination of three pieces of information. MANOVA results show that none of the treatment conditions, considered alone, are correlated with increased attitudes or behavioral intentions; however, there is a significant interaction effect on attitudes when information portraying a potentially annoying situation is combined with information about the costs associated with youth tobacco use. Post-hoc t tests suggest that this effect is concentrated among non-tobacco using respondents. (Contains 9 tables and 2 figures.)