We have guests that leave their door open all the time too, even at night! It is always so shocking to me, especially in the morning when I get up and walk into the hallway to hear them snoring away with their door wide open. They must feel very "at home" here which is nice. Many times I will close the door after guests leave for the day, especially if we have other guests checking in. One time we did have a guest accidentally open our bedroom door. She looked as surprised as we did
! Luckily I was just folding laundry!.