@Karen4229
Others here have provided valuable insights for you, but I'd like to add something about your comment "if the guest expects a bad review...".
Reviews are important. Not only for your listing because it's one of the things prospective guests look at when considering booking your place, but for the guest as well. If the guest is a good one, you should say so, to tell future hosts what to expect. The same applies when they are an undesirable guest (messy, caused problems, etc).
In the latter case (undesirable guest), my experience is that it is very much in your interest not to tip off the guest that you are displeased with their behaviour prior to their checkout, because as you suggest, they know they're likely to receive a bad review from you, and therefore, are likely to write an unfavourable review of your and your accommodation.
There is no advantage to expressing your displeasure to the guest directly, because there is little chance of receiving any compensation for it (unless of course, there are serious damages, in which case you have no choice but to demand compensation).
So, just smile, thank them, and wish them well. Then write an accurate, impersonal review of the guest. They can't see it until they write one for you, or after 14 days. But you need to do this to warn future hosts, as you should have been warned by previous hosts. It's really your only recourse.
Like you, most guests don't fully understand the "blind review" system. If they behaved badly, they likely know it, and are far more likely to write a glowing review of your place, hoping you'll do the same for them. So don't give them any reason to believe you're going to write a poor review of them. And if they don't write a review at all, it's better than them writing a bad one. You, however, are doing everyone a valuable service by writing your review of the guest, good or bad.
Good luck, and happy hosting!
