Dont forget, that gambling is only one of the things that makes or is able to make an impact on students. Besides gambling, students do multiple things to get distracted from studying. In fact, they most likely do whatever it is possible to skip studying. As a student, who knows what is gambling is, and is able to gamble for money, I see a person who is already +18. Which means a huge world of legal opportunities is open for him. Which means gambling will be one out of many that makes an impact on him, which means a very little impact on his education and character.