If the desired outcome is a greater awareness and appreciation of our natural environment among the population as a whole then the learning process will be slow.
Loch Lomond is the nearest National Park to the west, central Scottish population.....go and talk to the Rangers who have to deal with the concommitant litter problems. However, they are also being confronted by a tremendous number of interested people who genuinely want to learn. If they get it wrong a couple of times, that's life, but so long as they do learn, things will improve.
If the aim is to restrict access to a few *true, trusted and knowledgeable* folks then it's on a hiding to nothing. Tell folks they *can't* do something and there will inevitably be a backlash of, "Says who?" and "Why not?"
I suspect the real issue is how to encourage a standard of behaviour that allows for the general public to have quality leisure time while not destroying that very environment that they have decided to be part of, while trying not to do the nanny state or big brother that so gets backs up.
A few choice, easily repeatable sayings perhaps;
Bag it and bin it
Leave no trace.
sort of statements.
The problem then is what to do about those who want to *use* the natural resources? I forage all year around and have done all of my life. HWMBLT has brought in acorns, chestnuts, beechnuts, 5 different fungi, fresh greenery, and some birchbark this weekend alone. How does society limit the damage of the newcomers while balancing the requirements of folks like us?
The only way I can see is just as we are doing, slowly widening the knowledge, sharing our appreciation of the real world around us and accepting that it's not an exclusive playground for those and such as those.
You'll convert more folks to your point of view by courteous explanation than by ranting diatribes.
I'm going to go dig up some meadowsweet roots (dye and for tinctuing) and probably collect a bag of litter while I'm at it
Cheers,
Toddy