Hi!
This is my 5 cents worth on the matter.
We live in a World now where we have to leave some kind of mark to signify our existence.
Like Bradypus said people follow by example and some examples people follow are thoughtless!
As time passes they become an eyesore and a problem for others to solve.
Make a wish and hold it in your heart!
You don't need to spoil nature to do it.
A tree is a wonderful thing and it's beauty is not enhanced by someone's old boot, buff or used face mask hanging off it!
No one knows you left it and no one really cares why you left it as they pass!
Cruz de Ferro should be the place; just leave your stone! (that in itself has an impact)
People should be glad they walked and leave the Camino as it was for others to enjoy!
Bit of a moany old s*d i know
Enjoy the day.
Woody
PS Years ago(late1980's) i visited Morocco and travelled to Tangiers overland; never in my life had i seen such a mess!
Woodland full of hundreds of bin liners in trees, fields with plastic bottles and cartons as a crop, puddles a hundred feet long in the street full of rubbish people followed by example then and still do!