Teens need to be pointed to the right direction as I think most of them gambling are only doing it to get money and they would had been misinformed about things that can give them money this is why they rely on gambling for money and it is a bad habit to have as you're still growing up. Teens need to get proper enlightenment on how bad gambling can be if done wrongly before it gets worst.
However, it is not an easy job to be able to advise teenagers because most of them are in a period of rebellion and tend to be closed off from the advice given by other people regarding what they are doing. That's why as a parent it is also important to take part in providing advice and, if necessary, a firm attitude towards teenagers who do not want to be advised not to gamble at their age. These teenagers are very vulnerable to gambling addiction and this will not only disrupt their psychology, but also how they can focus on their school, therefore as soon as possible they must be given proper education about gambling.