Don't be an ***hole, vaccinate your children.
Anyway, I'm sure he would have been pleased. I think deep down Hunter always felt like a sellout compared to "real" writers, and didn't feel his writing was respected enough on it's own merit. His own fault, imo, as he was rather legendarily lazy. A billboard is a neat celebration but I'm sure he would have preferred a cannon that shot pigs blood on people as they went by.
"Are you a doctor?"
"Mantis Toboggan, M.D."