This is nothing new. It's been going on forever. Only difference is 15-20yr ago with the advent of widespread internet reviews, you can see more of it.
Generally the 'star' rating is taken with a huge grain of salt. Read thru why people had issues and see if those issues are consistent with what you would care about.
We stopped posting to campgroundreviews.com. We had a reservation and when we arrived, the campground acknowledged the reservation but said they were full and they weren't going to do anything for us...our review was rejected because we didn't actually stay at the campground.
