I think that traditionally there are hills and mountains in this country that have been considered more special than others, surely that's the case (even if not 'sacred' in more than a handful of cases). It may indeed be subjective, that's true. It's unlikely to be objective, because 'sacredness' is something us evolved monkeys have invented (along with all religious stuff. Naturally this comes with the usual 'more things Horatio' and anti-science disclaimers). Don't knock all those stories, however daft they are, because they're your culture aren't they, part of what makes your local area distinctive and interesting. But I think in this country in the 21st century it goes without saying that if you want to walk up a mountain no-one takes it quite seriously enough to stop you. But in 21st century central australia, the locals do still take it (very) seriously, so people ought to respect that. If you're advocating taking your litter home with you, you've got respect for something connected with the hill / mountain have you not? What is that thing?