lol. You all are pretty funny. SouthernCharm has a good story to tell if you all can get her to tell it on here. (don't kill me SouthernCharm)
It's never happened to us, not yet anyway. My sister-in-law was staying with us for about a week right after we got married. She knocked on our door and asked us if we would quit banging on the wall because we were keeping her up. I don't think she knew what we were doing. She had done it herself at some point, but she must have been so innocent-minded. Who knows. lol. But hey, at least she knocked instead of just walked right in.