In my opinion, it should be clear that these casinos are operating but that they cannot insure that people will not get sick. Even a warning like this is kind of stupid, since everyone should be aware by now that the situation we are currently facing can be dangerous.
If they are open for business and even have strict health protocols, no one can assure that no one will be infected. As some are walking asymptomatic, they can transfer the virus without them knowing. So it is really stupid if someone will sue the casino when someone gets the infection. What they can do to avoid such possible infection is not to totally go to casinos for now. If they really want to be safe from this virus.
That's what I meant, but it's absurd to threaten casinos with a lawsuit because of disease they have no control in.