Or what if a player went on a vacation or trip and wanted to play in their casino, obviously the ip address will change. And if the user didn't know that VPN is not allowed and won big money, there's going to be a big problem for that.
Isn't that the players responsibility to make sure that they are on the safe ground and won't be charged with any kind of abuse? I don't think the casino has anything to do with a player's failure to follow the rules...
They must read the rules carefully no matter what! It would be foolish if one doesn't and starts playing.
One thing I always do, even if I don't use the site, is I always check the T&C. It's better to be safe than sorry..