Today's teenagers are more advanced than their parents and it is becoming difficult for their parents to control them. Today's teenagers are gaining more experience than their parents especially due to the advanced development of technology, thus parents of today's age are struggling to control their teenagers. Moreover, most of the teenagers are using mobile phones, so any advanced subject is learned by the children before the parents. It will not be possible to stop the use of mobile phones from the teenagers because it is going out of control to prevent them from gambling.
That's right what you said because teenagers can gets the knowledge from many places and many ways including from their friends. Parents can't always guide them so parents must realizes and keeps trying to closer to their children so they can know what their children do. Parents also needs to learn more about the technology so they can know what their children will do and parents can follow without doing something that can makes their relationship with their children will become bad.
Teenagers gets what they wants from their mobile phones without taking too long so they can gets more knowledge that can gives bad or good for them. That will depends on them how they want to use that knowledge and if their parents doesn't give a right guidance while they are young, they can pick a wrong way that can harm them.