The BBC programme "Don't mess with me" is an eye opener regarding the amount of litter deposited and how effective simple ideas can be.
My only complaint (unless I have missed it) is that they haven't mention that.so often, bins are full. In fact many of the bins shown being used are overflowing. Our village has plenty of dog bins, but very few rubbish bins. We should of course take it home anyway, but adequate bins must help.
I used to be the water bailiff on a local fishery (adults only). This was a small lake only enough room for a dozen anglers. I collected a sack full of rubbish every 2 weeks during the summer, some of it hidden in hedges etc., must have taken more effort to hide it than take it home.
Things you find stressful that other people don't notice.