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.
It has been implemented by many casinos IMO, most casinos has KYC leveling system already and take a selfie or even video record must be in the one of the level.
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.
No casinos will do these, casinos are designed as business where the owner want to make money from the business.
If they do limit of playing for players, means that it will affect their income.
I know a 3rd party providers with such notification feature, but does it effective for players? I dont thin so.