There's just something fucking hilarious about laying off employees, mocking them, and being sued for improperly firing them -- and then whining that your competitor hired them and that they have access to Twitter information still.
I believe this fits well under the "fuck around and find out" doctrine.
This confirms what everybody has been saying: this letter is just a PR stunt.
Elon Musk's entire existence is a PR stunt. After all, they already fired their marketing department.