Tracking someone who's addicted is difficult and I agree to what the others have said above there won't be any action taken unless the person admits his/her addiction.
Once the person confirms his/her online gambling addiction there are ways to deal with it some people use this
subreddit to confess their addiction. Online casinos could link the subreddit to encourage others who aren't aware of their addiction.
Few bitcoin gambling sites manage gambling addictions by having a "self exclusion".
Nitrogen have their own self exclusion feature on the account settings(
screenshot).
Sportsbet would give you durations on how long you prefer to be self excluded.
During this time, a customer support agent will inform you of the 1-week, 1-month, 6-month self-exclusion available. There will be no variation of these time periods.