If you keep your gambling habit very secret I mean hiding it from your children there's no way they can have access to gamble especially when they are still under age, any kids you see gambling when he or she is not up to 18 years most have learn it from somewhere and the parents will be hold responsible, because as at that age he or she is not supposed to be allowed to be visiting their friends, rather he will be staying at home until he get to the stage of gaining freedom.  Well according to what you said for example: that if my child win a huge amount of money in gamble and I was ask to provide my kyc of course i will, but after then he will receive some punishment for gamble behind my back.