A striking observation

The Writers Guild of America is on strike. Based on the pictures I've seen on the news, nearly all of the picket signs say, "On Strike"--though a few I saw on TV said, "Pencils Down."

They're writers--couldn't they have come up with something more clever to put on the signs? "Residuals or Reruns?" or "Time to write a new contract!" or "Striking--out!" I know they don't want to write on strike, but they're not writing for the studios. Leno isn't going to get a full hour from reading witty signs!