The locals passed a law around here about political campaign signs along the interstates. One local US Senate hopeful got around it by using a pressure-washer and a stencil to put "Vote BLAKE" on a concrete embankment. There was much hue and cry, but what would you charge him with? Unlawful cleaning?

It's still plain and visible, some 12 years later. I'll see if I can snag a pic sometime.