Gambling is prohibited by law, as is selling alcohol to teenagers, but this does not mean that teenagers do not drink alcohol. The same applies to casinos, not all casinos require verification, but a teenager needs to think about where to get money, and how to send it to the casino to start gambling. If the casino allows a teenager to play, they will also be responsible for this, so this is not only a problem for parents who have not explained to their children all the responsibility for this.
At least, if parents explain and educate about responsibility to their teenager, they will not trying to playing gambling because the risks behind gambling. Teenager will be careful when they socialize with their friends or will not do something that can makes them in trouble. While they are using the internet, they can position themselves as a good user because they will responsible with what they do. Teenager will have their experience in many things and if they can share with their parents and gets explanation for what they find, they will not take a wrong way to enjoy their life.
By behaving friendly with teenagers, they may agree to distance themselves from the negative effects of gambling, in which case parents can play a leading role from the family. The need to receive education from the family is more important. The next step is to continue behavioral activities with their friends and if they are able to understand that gambling depends on age and maturity, then they may not get involved in the persuasion of friends.
In modern times about the use of the internet you cannot stop them but you can inform them about some negative sites and advise them not to use them. Teenagers will be curious about every new topic and it is important to create awareness by discussing the harmful effects of gambling with them through friendly behavior.