We had an interesting one with Bath Lane Recreation Ground in Fareham
It is a cycle;e route that avoids a fast 4 lane road between the A27 and A32
However the Council then put up "NO cycling signs on a sign adjacent the ones indicating the cycle route.
Took about 3 months to get "No Golfing taped across the top of the "No Cycling" part
However it took a further year to get the Cricket Club to understand that the Cycle Track was NOT an area to place their spectator seats, scoring tables and the massive great Scoring board
It was not uncommon to have thirty people standing, sitting in chairs or loungers.