They actually made some changes after the Jack Sparrow thing. Now when a character shows up they are almost always referred to primarily as the actor. This of course makes it nearly impossible for someone to claim they are using their character since they are parodying the actors portrayal of the character. There's a few exceptions to this like Rylo Ken last year.
It seems like that has been a non-issue for years with more recently the fear of big PR issues like what happened in CA taking precedence. I have to imagine this show makes executives super nervous. I mean think about it, you're running a multi-billion dollar company creating a world class family resort destination and then over here you have this show that's a mine field of political incorrectness in an ever increasingly boycott happy society that will use social media to tell the world how evil a company is based of one single incident.