Human crap as in excrement? Or garbage materials left behind? It’s easier to pick up human trash ie plastic wrappers etc than dog sh#t. Plus you are less likely to get any disease like ringworm etc from human generated trash than stepping in dog sh#t. I am a dog owner and cannot stand dog owners who do not pick up after their dogs. It’s worse than a pop bottle left on the beach, both are irresponsible behaviour but give me a pop bottle to pick up rather than dog sh#t anytime.