I love it when there's a pile of my kids' friends' shoes by my front door.
The bigger the pile, the happier I am. (My kids have good friends.)
It is rare to have a kid from the Pacific Northwest come to my house and not pause at the door to step out of his or her shoes. It's part of our collective culture. Kind of like the way we all keep an eagle eye out for slugs when we walk barefoot outside.