When we were in Scottyland a coupla years back we actually saw real signs meaning "No drink" leading onto some side roads.
Never seen them anywhere else.
Wish we had photographed them.
Nothing to do with "Don't drink and drive" just simply "No drink" i.e. "to be taken down this road", somewhere northwest of Loch Lomond.
They used to on private roads ect now we got these..