This study looked at the impact of a problem gambling prevention class on young men who have never gambled. All participants were conscripts attending a two-day military recruitment program in Switzerland. The results showed that participants had negative representations of people who gamble problematically, regardless if they attended the prevention class or not. People who gamble problematically were mainly represented as being mentally disordered and self-centred. Participants who attended the class were even more negative than those who did not attend the class. These results suggest that problem gambling prevention programs need to consider who they are targeting. Programs may have an unintended and opposite effect on non-gamblers, such as increasing their negative views.