using the countryside or nice place where people go for a walk
Almost all of the land in the UK is used, affected, farmed, managed by humans. I wonder if the idea of 'nature' as something separate and pure to be unsullied by humans might be at the root of some of our problems with poor ecological choices!
We live here. We are nature, we aren't separate, we can't preserve 'nature' as something that isn't fundamentally intertwined with humans and humanity.
Having lived rurally most of my life, I find the idea that a not-urban space should be pristinely absolved of human traces so that townies can periodically visit and bask in its beauty impractical to say the least. Yes, green spaces and wild spaces are very important, but they are all also connected to our lives intimately and daily and always, and most often they are also workplaces and our homes.
Yes, there are lots of rocks out there with various messages on them. We have Jehovah's witness rocks, 'inspirational quotes' and lots and lots of 'NHS thanks' rocks around here. (I live rurally). I just cannot get worked up about it.
I do share concerns about littering & potential misplacement of materials, and I have always carefully considered the consequences of my actions.