It's funny if not a little morbid. But what strikes me as more than a little ironic is that the message is so long that it would more than likely make you wreck if you tried to read it all at one go. There's no good place to pull over to read it since both sides of the road are ditches. Most people would have better luck driving while texting than reading. As I said, it took more than a couple of drive-bys for me to get it.
As the host (Marc Maron) of my new favorite podcast says "WTF?"
I'll try to get a picture before they take it down and post it here. (and here it is...)