people who have just picked up their dog's steaming pile of poo, put it in CLEAR plastic bags, and then walk along gaily swinging it like Mary Poppins.
They should stuff it in their pocket. At least then I'd be spared the sight of it, AND it'd keep their hand warm.
Whilst working at Lodge Farm last year, i noticed that the good people of Kings Heath, had taken to tying said plastic bags to the nearest tree or bush. At head height. Nice touch.