The answer will be "no" for most users, but truth is that in reality, most parents who gamble teach their kids indirectly to gamble without knowing, how
This is true,but some parents are more responsible than others.
I don't have kids,but if I had kids,I would never teach them anything about gambling.
Kids have underdeveloped personality.They are too vulnerable to different kinds of addictions.
If you say to them that something is forbidden,they would want that "forbidden fruit" even more.
The only solution to this is to not give any money to your children(except for food).
They can gamble,but only with their own money and only after they are old enough.
I don't know about a flood of teenage gamblers.I don't know where did you find such data and how can you verify it.Most of the kids/teenagers don't have money to gamble.Clearly somebody must give them money,so they could gamble.