One best solution is to cut the internet connection. Without online access, that obviously stops online gambling addiction.
Still, bro... I think this method is still ineffective in stopping them online gambling addicts, let alone just cutting off the internet connection, even those who don't have a cellphone can still play with other people.
I can say that not without reason, but because I witnessed the incident that happened to my friend, they were willing to sell their cell phones in order to be able to make a deposit, while to play it, they hitchhiked to other people.
Do you not think disabling gambling sites on ones browser settings could be of help also?
Even blocking sites is still not effective, gambling site notifications often appear every day with different sites and also rampant gambling advertisements as well as gambling streaming videos that always appear on the homepage which will make them tempted and return to online gambling.
The only thing that can stop gambling addicts is themselves, when they are aware of the negative impact they are having from the online gambling they are doing. Or when the money and assets run out without any residue, they will realize and break away from online gambling addiction.