Absolutley NOT! Once again, there DOES NOT HAVE TO BE A PAX IN AN EXIT ROW!!! Please understand this everyone!!! Also, it is now againt the rules to move inbetween cabins once the A/C has the breaks released. Yes, even a F PAX is not supposed to use the bathroom in the back of the plane in Y. But please people, keep in mind that there can be 100 seats on a plane, 4 of which are exit seats, and if there are 96 PAX on the plane, and the exit rows are empty that is fine!