In various cases some casinos realize that some players are falling into addiction and they get certain notices that they can only play with a certain amount of money during the day, I think all casinos have it.
I'm not really sure how strict is the casino want to handle/exclude the addict, I think in fiat casino he will obviously doesn't have given to enter since a fiat casino license is protecting their gamblers. But in online casino, I doubt it, there's some addict had using self exclude feature, but the casino still give him access to create another account and let him to play. Also if the casino really gave him permanent banned, it doesn't mean the addict can't play in other online casino.