2) How would you solve this problems?
it's not a problem that should be solved by me. I think if it would be possible, the gambling sites should allow user to set a limit they wouldn't go above in a day so the possibility of going too extreme can be easily curbed.
It is not going to help with the people who spent more time on gambling, let's say a casino allows only player can access site for 2 hours a day and if someone wants to engage 24/7 they simply can pick 12 casinos and repeat so it's something that has to be dealt from the other side which is user's where they need to give awareness about gambling addiction and if they run some programs to create awareness then it's pretty much appreciable.