How free is their will? Can they choose not to poop? Can they choose to use a toilet when they have to poop? Can they choose to have all of the prerequisites to have their own toilet to poop in? (a stable location to live, an income stream to pay for it, freedom from addiction or mental illness that would disrupt their ability to generate income...)

How would I know if anyone has free will or not?

When I rationalize my poop scooping duties by juxtaposing them with the duties of parents and dog owners, I end up placing the babies, dogs, and adult poopers in the same category. I don't know if that categorization actually reflects reality, and therefore I can't tell if that kind of rationalization will actually help me react to the poop in a constructive way.