Can legally sue to have “Hail Satan!” signs put up and federally it will win because freedom of religion, the 1st Amendment. Federal Law Protections for Religious Liberty – Department of Justice https://www.justice.gov/crt/page/file/1006786/download Hail Satan.
In subreddit r/atheism
In a post titled:
New LA Law Requires Teachers to post In God We Trust in Every Classroom