Armorplate108,
After the log thing failed,I already covered that piece of land at the border with weed barrier fabric and card board((weeds are taking over).Got some bags of soil and put them on top of weed fabric.My plan was to build a small patch of raised flower bed at the border where they cross into mine.For any reasonable person it gives a hint that it is a possible flower bed under construction.It didn't stop them. What if after all my hard work they simply walk through stomping on the flowering plants.All the necessary materials are lying there along with the logs. There is no guarantee they won't destroy the flower bed when I am not looking,just out of contempt.