Rest Stop rubbish

I'm sure this topic has been aired plenty of times in the past but it does no harm to bring it up again.
We've been on the road for a couple of years and never cease to be disgusted by the state of the highway verges and rest stops along the way. It is probably a credit to the sort of people who inhabit this forum that it seems to be less of an issue once you leave the bitumen.
We're currently in Perth after wending our way down the WA west coast where it seems worse than most other places - perhaps due to vast distances and limited resources for clean-up teams.
Nonetheless, EVERY roadside rest stop seems to be equipped with bins and yet travellers still manage to litter the surrounding countryside with bottles, cans and those oh-so-attractive streamers of perforated white paper.
We carry a box of disposable gloves and a supply of plastic shopping bags and always make a point of cleaning up any spot where we do an overnight stop. Invariably, 30 minutes will produce enough rubbish to fill at least one complete bin and sometimes more.
Much of the rubbish has pretty obviously been lying around for months - long enough for bottle labels and can logos to fade away, while who-knows-how-many travellers have passed through and tut-tutted at it all.
So how about we all take the time to do our bit? I don't doubt that nobody on this forum has contributed to the mess but that doesn't mean we shouldn't do something about it.
Sadly, we share the countryside with people who couldn't give a toss about what they leave behind. I've even done my bit to fix up fences that have been cut to allow travelling ferals easy access to use rural properties for their dumping ground.
I sometimes think there should be on-the-spot checks and fines for people who carry a roll of toilet paper but no shovel. Or maybe we could just shoot 'em?

Michael