Yes, I stayed in one that had one in the entryway pointed at the interior of the front door. Very uncommon in my experience, but this was in someone's home that they actively lived in, but were away for the weekend, so I found it to be understandable.
If I'm renting rooms, I certainly don't expect the landlord to be in the business of filming myself or family, especially as we may well be walking around sans clothing. Not only is this rather illegal, I suggest plenty of people would find themselves responding to the landlord rather violently in such a situation. And I would not blame them.
My experience was such that it wasn't that way at all. The camera was indoors but not in areas of the house where someone would be walking around without clothing, and they were clearly disclosed in advance before booking, and they were clearly visible in the home.
Some houses have areas where it is fairly reasonable that people wouldn't be running around naked, e.g common areas shared with others, or rooms with a large amount of glass open to the exterior of the home. And in some cases it might even be illegal for you to be naked in those areas if exposed to others.
I'm not defending it, I said I understood it. I have similar cameras in my own house, so why wouldn't others?
Further, expectation of privacy are commonly accepted to be more complicated than "indoor vs outdoor". To suggest otherwise is just hyperbolic pearl clutching.
My two examples above are perfectly normal situations in which expectations of privacy are lowered.
