People are definitely disgusting, that is for sure. I work in retail, and I can't tell you how many times people (adults and kids) poo in the fitting rooms and just leave it on the floor. I'm talking about adult women that will enter the store, converse with the employees, take serious time to select nice clothing, then go into the fitting room and squat down and go. Sometimes they'll use our garments as toilet tissue.
People are not too distant from animals in many ways. My dog will occasionally have an 'accident' but some people have an 'intentional', if you get what I mean