You remember correctly. I remember seeing these signs on many highways in the midwest, and asking my parents what they meant.
My parents didn’t give me an answer, and I have wondered what the beef was for about 60 years.
I took the time to do some googling. Earl Warren apparently was a prominent factor in desegregation and negating Jim Crow laws....regardless of that...it appears there is a mechanism to impeach a SC justice, but it is as difficult as impeaching and removing a President. House impeaches, Senate judges.....we all know how that turns out.
Never has there been a more corrupt, unreliable and more duplicitous group than the 100 Senators of our country. I am including my own two Senators from Georgia. When either comes up for Primary, I’m going for the primary challenger and give him/her all the money I can. Chamblis/Isakson a couple of real RINOs who value the Washington scene in my book.