My neighbors across the street have had their flag hanging on the vertical porch post in an upside down position. It has been that way for several days, and people are coming and going routinely, so it is not a distress signal. I want to approach them first and simply ask them to fix it, but am not sure exactly what to say. By what authority would I do that? What are the consequences for their action and who would enforce it? Who would I call if they choose not to fix it?