Have you ever walked in British countryside? There is already limited right to roam and people are generally courteous about walking through people's property, shutting gates etc.
Walkers are one thing; it's when people stay overnight and can't be asked to pack away everything they hauled in that a layer really begins to accumulate: plastic wrappings, bottles, butts, wads of beshitted toilet paper, and so on. But I've witnessed enough hedge-rubbish in Snowdonia to not be blown away relative to what I saw in Switzerland and Norway.
