I almost always find discarded line and pack it out with me when I leave. I don't think leaving messages on this board will have any effect. My guess is the people that have enough interest to read about fishing, aren't the target audiance we need to reach. It's the uniformed and downriight ignorant, that just down' t care. I take a further guess that the children of those who litter and lay waste to fishing, picnic, and every other area, will do the same things.
But I keep picking up the line.