I will admit that I once answered the door covered in a black sheet that was nearby, and greeted them on Arabic. It was fun to see the expressions on their faces and how fast they ran.
Once I was sunbathing naked in the back yard when I was a teen when the religiots showed up. I gave them a view.
I talk their dick into the dirt (metaphorically speaking, it might be a woman!) I let them know I'm agnostic and tell them to prove that there's a God! Interestingly enough, they haven't been back to my house in 5 years!
I just tell them I'm a devil worshipper and we go from there.