1. They can use more secured ways to identify the real identity of their customer, the best thing to do here, aside from valid ID is they should add "take a selfie" on identity process.
2. They can also set a time limit of playing for a player, give notification if this would be their last game anymore for today.
3. Set a notification showing how long they've been playing.
1. Do you think licensed casino nowadays aren't asking selfie picture as a KYC verification? it's more than that, they even ask driving license, your bank account, your monthly check etc. However selfie picture isn't really a valid proof, what if his parent already took it for verifying an exchange or he lie to his parent the selfie will used for a good thing?
2. and 3. Nope, casino is want to make a lot money, why they need to stop a gambler who's keep losing?