I was looking over my itineraries and seats a minute ago and noticed that on a couple MD88 flights, the entire right side is already almost full while the left side is barely touched. This must be due to the 2-3 configuration in coach, with more couples, pairs and duos wishing to be seated together. It's been so long since I saw empty seats. Do they ever have to rearrange pax on MD88's to balance the load?