Two occasions I have had to leave a poo, on both, I ran out of bags due to unexpected pooing quantity.
Occasion one I found another dog walker within a minute or two and got a bag from them and went back.
Occasion two, I knocked on doors (not easy as most peoples doors I can't actually get to due to wheelchair), didn't see anyone, had to go all the way home and get a bottle of water and kitchen roll as some of it was runny.
I hate poo on the pavements, it gets in my wheelchair wheels, if I am using a manual, thats then on my hands. Boak.
My dogs also step in it and then its on the carpets, in my car, on my knee where they've put paws up to have collar/lead/etc on/off..
I really hate poo in gateways onto fields/footpaths, from the people who let their dog off at the gate and march off leaving doggo to empty out right by the gate. I can't negotiate the bloody gate AND avoid poo!
The worst thing though is this - broken glass half buried in mud, strewn across the street so there is no way round. Slices up dog feet, slashes tyres, sticks in tyre treads and slashes hands.
I have to negotiate broken glass, human spit, human litter, human food waste, fox shit, cat shit, dog shit, HUMAN SHIT, human vomit... most days when we walk the dogs round the pavements and public footpaths.
None of it is pleasant and most of it should not be there.