Alaska, Colorado, Oregon and Washington permit medical and recreational use of marijuana.  Another 19 states permit the medical use of marijuana.  KOIN and  News 10 have run an articles on the purchase of marijuana billboards by Oregon advertisers and KPLU has written about Washington’s first marijuana billboard advertiser.   Insider has seen several marijuana ads on Seattle area billboards.  You need to be thinking now about whether you want to run these kind of ads because there will be a demand if your state’s laws get changed.