@Laura2592- I am experiencing that right now. A repeat guest who has been in the home several times, coming to the local area every few weeks for business. The back of the house, which contains the family living room (as well as my de facto office) is clearly spelled out in the house rulers as off limits to guests. Over the last two stays, the guest began frequently walking into this area, one time sitting down in a chair, and just this past stay (I think to test our limits) tried to the use our TV (a big no-no, as house rules clearly state that the family room TV is not for guest use).
I finally had to say something, but did it diplomatically. I explained that due to the Enhanced Cleaning rules, every area the guests live in was immaculately cleaned prior to each arrival. I further explained the family room was for us, the family, and (while it was clean) it wasn't properly vetted for guests to enter and use. Also, per the name, its the family room and for the family. I think the guest got the message.