Actually...no.
I know the group that puts up the messages on the boards, but I don't have anything to do with it. They started doing the funny/jokey safety messages a couple of years ago, and they got a lot of positive feedback, so they've kept it up.
A lot of people ask me if I'm the one putting those messages up because they see stupid jokes and assume I'm involved. But I've never contributed anything. Actually, I occasionally get annoyed with the messages. The reason is that we spent millions of dollars on these message boards in order to have a robust information system for drivers. Now you get stuck in a huge jam on I-95, wonder how long the delay will be or if you should get off the highway, look up to find the message board, and find some stupid joke about Baby Yoda or something.