One more story!
Between selling and buying condos, I rented a first floor apartment in a 150 year old Victorian for 8 months. (Odd time, but that was the lease.) The landlords were a bit clueless, but they had found a phenomenal but pushy real estate rental agent. In my lease, I had 24 hours notice before a showing. As a full time worker with a stay at home dog, I needed to take care of Mort when people came through.
Well, the agent was taking to calling me at work to tell me that she was going to have a showing that afternoon. Eek!
I never successfully stopped the practice, but I stopped cleaning. The realtor would do a once over of the apartment and fix whatever was out of place. So, if she had a showing, she would have to make my bed and wash my breakfast dishes. She also had to deal with Morty, who liked her, but was not a fan of everyone. It reduced the lack of notice, but didn't stop the behavior all together. (When I had my notice, the place was cleaned.)