most people would start off the thread with some actual examples of their own. Here are some to get you started: http://www.zoochat.com/25/30-most-bizarre-zoo-signs-125385/ http://www.zoochat.com/38/funny-signs-around-zoo-207633/
Following Chlidonias' lead, here is my favourite - both signs are quite sensible on their own, but they shouldn't be next to each other. http://www.zoochat.com/43/health-safety-clore-317117/ Alan