Wild and Scenic or Scenic in the Larger Sense and not so Wild in the smaller sense

After the third canoe passed through the wing dam and a dozen lazy trout resting on the bottom, I tied on a small nymph ( pheasant tail of course) and figured let's take a few cast once everyone settles down. They always settle down, they no longer scurry back and forth just lie there like good little soldiers waiting for some morsel of food to float into their mouths. One cast, a couple got excited and started to fin back and forth and second cast, two more looked around to see what's up! Third cast, I stopped short, the noise of an ATV was close by. ATV?  None allowed, who or what asshole? Fourth cast, the water turned muddy and it was over (the fishing). I took a walk upstream to follow the muddy flow and it seemed to go on for quite a distance. What did they do? Ride up and down the stream bed? I heard the noise real close up the trail back to a parking area and decided to retreat. No sense confronting some idiot or idiots alone.
A day of disappointments indeed, canoes, idiots and carelessness. One woman in one of the canoes asked her partner " what's a special fishing area, what kind of special fish ?" No clue what kind of stream she was in, nor that it has been in the news the last few years or that it's the only place locally where brook trout occur naturally. The message is lost, or just ignored? The last canoe contained two burly middle aged men, the were fully equip twitch a full tackle box, several bait casting rods, a trolling motor complete with battery and a large landing net. Considering this is a wild and scenic river, with limited access, permits required, numerous signs placed about regarding regulations and rules I would say disappointing is an understatement. A high note was one man in a very small kayak who apologized for intruding as he paddled by. His boat was loaded with trash he had picked up alone the way. He understands, he understands!