Who admires a piss-stain on the wall or an empty plastic bottle, a chips packet on the road or an ugly stinking dump of garbage on the roadside? Do you think people who do this, they admire it? I think not. Then why do they do it? But more importantly, what is it that you're going to tell them that they don't know already? Are you going to lecture them on "duties, responsibilities, aesthetics, civic sense"? Are you going to appeal to their sensibilities? Or are you going to appeal to their sensitivities and their "Love for Nature"? Or are you going to threaten them with law?
...Just what is the grand plan and what do you expect to achieve from it? And are you really stupid or what?