Parents are quite aware of their children, but their children are also much smarter than their parents these days. Especially now, school children save their tiffin money and participate in gambling at some point. Moreover, nowadays casinos and gambling sites have given the opportunity to bet on very small amounts, due to which if you combine the tiffin money of two days, you get a chance to win once. Moreover, online gambling and casinos are so available that anyone can gamble anytime, anywhere. Therefore, students currently studying in school seem to be more attracted to gambling instead of studying.
All those types of strategies that children and adolescents do, such as saving money to gamble, is something that should not be allowed, at least in physical casinos they should not be allowed to enter, however the only way I see that they can access an account to gamble is with an adult account, and that is something much more irresponsible, that is why now, things that have to do with adolescents and children, their phones should be checked yes or yes, to see what they are into, as well as their PCs and everything.
If my country could adopt such a strict rule it would really help to control the rate of underage gambling but lately it seems like no one cares about what goes on in a gambling center or casino, everyone is just concerned about how to make money. And as you mentioned their phones should also be checked by their guardians just in case they gamble online, doing this would help curb such things from going on