A dog owner carrying a see-through bag of shit while walking their dog. Though they are being responsible by picking up their dog's crap, nevertheless, they are walking around with a bag of nasty shit in their hands!
Why do shit baggers use clearbags to pick up after their dogs?
'Shit bag' derives from the Latin 'shitius baggus', which in early Roman tragic theatre represented the potential to spoil a positive scene. The shit bag would be hurled at an actor at random.
The colour brown has since been associated with shit-bagging.