Think that someday you won a big amount of money and you thought that you're lucky and this amount will change your fortune and all of sudden, the site asks to verify your phone number or documents, and you're left with nothing as you provided the wrong details. If you want to fortify your money, then you may take chances, but I will not recommend using a fake identity where you are putting your real money.
I can't understand why so many users are still discussing this subject. Roobet made passing level-1 KYC mandatory long time ago. By submitting fake information, the user is not only risking to lose his coins but he is literally cheating (there is no other word to describe it). Of course, there is no way to prevent people from doing it but they need to assume the consequences when they get caught, and they will.
If you don't want to verify your identity then look for a casino which do not require it.