just don't open the door, just pretend you're not at home.
I did that to my Uncle, everyday he drove to Tunica casino from Germantown and then from Tunica casino to my house in Memphis...
And he claimed that he had to use the bathroom :roll:
I complained to my mom about my Uncle

, because I
was babysitting my nephew who was a baby, and
I didn't like the way he kept ringing the door bell and
waking up my nephew from his nap

and I don't
appreciate him using the house as a toliet.
My mom said but it takes him a hour to drive from Tunica to Germantown everyday, and he loves to gamble.
And I told her that there are gas stations and other place that have bathroom, even Walmart got bathroom.
I felt that my Uncle disrespect me and my nephew and my mom wasn't even at home... so now he stopped using bathroom at our house. Whew.