If you’re going to go to an introvert’s house, make sure you call ahead of time. You know what; scratch that. Whenever you go to anyone’s home, make sure you let them know you’re coming. It’s the very least you can do. You don’t want to catch them engaging in anything funny now, do you?
But it’s even worse for introverts. They already had the next month of zero human interactions planned out, and you, showing up without warning, have just lodged a wrench in the operation. Trust us, they can hear the doorbell ringing. They’re just not going to answer the door.