A couple years ago Self-Exclusion noted that a Canadian court had refused to certify Ontario's self-excluded casino gamblers as a class for the purpose of a suit against the Ontario Lottery and Gaming Corporation (OLGC). The claim is that the OLGC neglected a duty of care to prevent the self-excluded from violating their order by returning to casinos and gambling. (The significant revenue emanating from self-excluded gamblers who continue to gamble certainly could be a spur to mixed motives on the part of casinos or taxation authorities.) The court ruled that individual lawsuits could go forward (and some have been successful, in terms of monetary settlements), but that the circumstances of the self-excluded gamblers were sufficiently diverse that class status was inappropriate. That decision from two years ago was upheld once on appeal -- but now Ontario's highest court has agreed to hear an appeal of the earlier rulings.
In 2011, Ontario rolled out facial recognition systems to help enforce self-exclusion bans.
The responsible gaming section of the OLGC website offers links to some valuable videos discussing self-exclusion, as well as videos aimed at combating common gambling fallacies.