Re: If your son who is over 18 asks you how to bet on soccer, would you help him?
My question is: Do you take this opportunity to teach him about responsible betting, or do you try to steer him away from it? Also, if you are still supporting him financially, would you allow him to use the money you provide for betting? the money you work so hard for... 
I wouldn't encourage him to place a bet as of the moment, not until he can stand on his own two feet where he already land a good paying and stable job. But, what I do as of the moment? I would teach him how to analyze the match; who will potentially win or who lose. I wouldn't teach him how to analyze the odds either as it might somehow give him the idea that could entice him in placing bets. Though, everything could be learned over the internet, but at least I did what I can do as a parent who does not want my child to get involve in gambling at an early age.
As parents whose really that more experienced and more knowledgeable into various things then we would really be doing our very best on trying out to avoid them at early age.
We do know on what are the impose risks that it has when it comes on losing money and the worst on which we are that trying out to avoid them on getting addicted with it.
Somehow it will really be just that depending on how a child will really be able to assess things and treat it up basing up or according into their understanding.
Being that too strict might really be leading up on something on which cant be controlled out.