Why the hell is interested party doing this? Here are a few pertinent links:
Prohibition doesn't work. Is taxing billboards a way to bridge free speech without creating a chilling effect? Mix it up live, South Dakota. And how is billboard speech different from the offensive but protected language recently upheld in Snyder v. Phelps?
Willie Nelson has cancelled tour dates in states where his medicine is illegal. Smart man, that Red-Headed Stranger.