I don't know a casino that's completely KYC free anymore. freebitco.in used to be one but they even get to them so, they will indeed ask for your papers when the gov wants it from them. Mixers on the other hand weren't dooin any KYC for the obvious reasons. Casinos will survive this mess probably since it is not really different than selling domains online... They sell entertainment. If the casinos also go down, then so legitimate business can sell any product for bitcoins... and just like that crypto dies.