@Kirsten122 Yes, for sure if a host has found that guests aren't using common courtesy about something that seems like it should be obvious, it bears mentioning as a House Rule. I was just saying that the explanation and details regarding the rule could be elaborated on later, so it's not cluttering up the important stuff you want them to read.
But I do think that too many house rules, as opposed to just letting guests know when they arrive how you like things done, whether it be not leaving personal gear in common spaces, or taking their shoes off at the door, doesn't really serve much purpose, since you can't claim any money for a guest breaking a house rule, and if you boot them out over it, they get refunded the days they didn't stay, anyway. Whether a guest ignored something that was listed as a house rule, or whether they ignored a simple request delivered verbally to please not wear street shoes in the house, reference to disrespect can be mentioned in a review.
Guests assuming that they can use the couch in your family living room as a sleeping spot for one of their party, instead of booking a place with enough beds for all, certainly bears warding off as a House Rule.