A Joke Program usually does not cause damage to the system. They are programs created to cause temporary problems to the operating system, such as crashes or unexpected behavior changes.
But there were cases of programs of this type that damaged the system unintentionally.
I believe that some may even install something malicious. Because usually, the user will add it to the list of exceptions of the antivirus. But that's because I'm cautious in this matter.
Particularly, I would not install or run such a program on one of my computers.