People who walk their dogs at night and don't bring bags, so when their dogs crap they don't have to pick it up cause apparently if no one sees it happen, it never happened. So there for it is acceptable.
(Typical Night Walkers)
Melissa: "Hey where are you goin hun? It's like eleven thirty"
Erik: "Oh, I'm just gonna take Ema for a walk."
Melissa: "Well don't forget to bring bags with you."
Erik: "What! Sorry, can't hear you gotta go love ya."