Private waters and land are a touchy situation. Many of us get tired of the trash folks leave behind. Walmart bags, fast food crap, etc. I had to put the skids to it here. Which I'm sure many of us land owners have encountered. I've had folks riding along the Vermilion river and shooting squirrels along the riverbank, while the pellets hit the house. The trash is unbelievable once again.
The organization you speak of can fight it, but I'll fight back where we live.