People from banned country are also interested in playing games but yes it's against the rules and should be avoided at any cost as if you are found using VPN to access the casino games your account could be freezed with the funds in them.
There are some mirror links provided by the team sometimes but many people still prefer these VPN to have some privacy also even if they come from allowed regions.
They may want to, but just because they want to doesn't mean that they should. VPN will make sure that you get in even if you are from a banned nation but that will also cause you to lose a lot of your money if you end up getting caught, and it's not really that hard for you to get caught if you are using VPN as well.
It means that eventually you will get your account frozen and then there will be plenty of people crying here about how their account was seized for unjust reasons, when in reality duelbits has all the right to do that. All in all, it's going to be pretty decent and pretty good, we shouldn't really be doing something risky anymore with this type of bans.