This was highlighted recently when we had snow. The little brown parcels really showed up then.
When we moved here several years ago, I wrote to our local Councillor. Her reply was interesting, she said it's the most complained thing about Marple.
The other thing that really, really annoys me is the habit of dog owners actually taking the time to pick up theirs dog's mess and then flinging the bag into trees, over peoples fences, into hedges, into the canal. Oooh I can feel my blood pressure rising now.
I too have had an unfortunate instance where my young nephew was playing out in our local park, had it all over his shoes, luckily I was close and smelt in just in time. Those shoes went in the bin and he was carried home.