We are already in the 21st century when teen are interested in doing things they don't even have idea about. It is good we understand the time that we are in so that we can know how to discipline children on what to do and what not to do. Technology is moving very fast and it is good we strategize on how to talk to children and guide the from going too far doing things that would crumble the future. Gambling cam really have great effects and children and it is good we know how to react to them and talk to them in a way that will not take them far away from us. Gambling is not meant for the little once but it is quite obvious that children are going too far in gambling.
If there is a way to limit the way teens get access to devices and technology it will limit some unnecessary behaviors at that age and make them not to be aware of new technologies and the evolution of the world, which will cause more damage than good. But it can't be possible that is why in this era grounding children will not stop them from doing what is bad but good parenting is what gonna work so well.
More of advice, encouragement, and exposure to reality. Especially the dangers of gambling will help guide these teens not to engage in gambling. Sometimes using fake scenarios to demonstrate the disadvantages of gambling to your kids works well. It is not wrong lying to them because it is better lying to them so that they ma discover some truths.