I have yet to see a property management company leave a guest a bad review which causes serious problems for private hosts. First, bad guests are not pointed out in the review process which leaves private hosts who rely on guest's reviews vulnerable when making a hosting decision. Secondly, it "pads" the guest's star ratings and keeps the ratings high enough so that Airbnb's automated system does not flag the guest for an internal audit.
Let me illustrate. Guest #1 has seven reviews; four are private homeowners, one host who appears dubious himself, and two property management companies. The four private owners all wrote very bad reviews mentioning property damage, safety issues and rule violations. The dubious owner wrote, "Great." However, the property management companies left rave reviews.
Guest #2 has four reviews, two are private and two are management companies. Of the private reviews, one is poor and one is good. The two management companies wrote great reviews. This guest's stay with us ended when the police were called and it was obvious he had acted in similar manner at previous bookings but his reviews did not reflect his true actions.
This is just two recent illustrations of how property management company's reviews can hurt private owners. These companies should be reminded that Airbnb terms of service state,"10.2 Ratings and Reviews by Guests and Hosts must be accurate."