But if it happens that their country are in that list and also the provider doesn't allow them to gamble due to same reason, I think much better for them to follow the rules they write their so that they will not face any serious issues.
Restrictions work differently when you are restricted by game providers. For game provider restrictions, this is one place where VPN enabled casinos can come into play. You can access such certain games from game providers in a restricted zone and should you win, you aren’t tailed to have won bet on a game from a restricted zone based on providers. It just counts as won bet and that’s it.
When it’s the casino itself and you proceed with VPN, you are in for some real trouble as, your accounts can get blocked and you don’t have much of say in it.