Some time ago we let some friends of ours stay in our vacation home while we were not using it. Then when we went to stay there we found a lot of family photos of theirs hanging on the walls in different rooms.
Queenie, what made them think they could decorate my home that way? And what should I do with the photos?—Offended host
Probably your guests just wanted to have the pictures around them while they were staying in a strange place, and forgot to take them with them when they left.
Take the pictures down, pack them up and return them to your friends the first chance you get.