I would think (but I don't know) that there are good operational reasons for using the rear doors. But I also understand those who are saying pax who paid elevated prices (made up of tax, fuel surcharges, ticket cost and other) should have priority unloading. So we seem to have an impass. Maybe all the lower class pax could sit and watch as the higher classes depart? No, maybe not! Well, I guess we will just have to live with it - unless in reality there are no operational reasons. In which case it must be a filthy lefty plot to undermine management.