I agree with Dave above. Like him, I run great propertyies, and care deeply about guests having a great experience.
But with that said, I strongly feel that the STR reviews process has been completely bastardized by AirBNB, and it is spreading. Coming from a Hotelier background, bad reviews can be useful; and ALL 5 star reviews become meanings. A review should not be a commodity that guests can sell; and Hosts are not doing that industry a favor by purchasing them. Every property, should not necessarily be every guests' cup of tea. A negative review can help Hosts keep the guests that that Host does not want (but other Hosts may very much want) from booking. Therefore, guests can be matched up approiately with the right property for them.
For example, I do not want smokers of any substance, inside or outside of my property. Book elsewhere. Many Hosts don't mind outdoor smoking, or even indoor marijuana use. I state it many times in my listings, and in every pre-arrival and arrival message. But I still have a guest message me after check-in (after acknowlwdging the no smoking policy), "So where can I smoke, since I can't smoke outside." When I explained (basicall) anywhere, but here, she lectured me on how it isn't her fault that she smokes, and don't I think that she wishes that she didn't, and how hard it is being her. Then she proceeded to smoke in our laundry room (which is in an out building in the backyard, and shared with another unit.) I don't actually remember if she reviewed us, but if she did give a negative review, I would have answered, "You are not welcome back." I would have written to furture guests to not come here and smoke. Book another property in you smoke. There are many choices.
I personally, do not think Hosts who regularly give guests refunds should be bragging about their reviews. I give refunds when my team or I screw up; which, frankly, is slightly above never (we have, but really rarely).
That's my two cents.