Efialtis from BTCGosu mentioned that some of the casino managers make exceptions, and I can imagine how that's possible, but I'm curious in what you would like to see there.
I think KYC is the trend now, so it is somehow difficult to not implement it since regulations are imposing that centralized casino must implement KYC for anti-money laundering. I think if the casino wanted to implement KYC, they must implement it on the registration and before enabling deposit address so that a player can have a choice whether he will undergo KYC or not before playing. That way player can avoid losing fund in relation to KYC issue. This also solve the casino's problem of multi-accounting and other exploits done by users.
It is either implement KYC or not, if the casino wanted to implement KYC then do before the player is able to deposit funds.