I hear that thieves go around stealing plaques, street signs, etc. even in grave yards. What a society! It certainly should get written about in the papers and in documents at City Hall and Local Museums, along with photographs. Bug your Municipal Councilors, Local Historians, Museums etc. to see what can be done. I spent hours painting up road signs, even using a ladder to put them above tall arm reach of the local thieves or marading hoodloom teenagers walking the street from the local parks and marinas, to collect road signs. The road worker took them all down on trees he was going to remove, the local marina guy had them in his truck then at his house, I finally got them back, except one, which he put back up at arms reach height and it disappeared. So even wooden signs get taken. I haven't replaced the signs. One effort was enough for me!