They will in the future. The problem is they allowed people to purchase tickets so far in advance that many of them are already paid for. The airlines can't adjust the prices because of fuel increases. AMR is in deep doo doo over this. They had to add the bag fee because, rumor has it, 90% of the summer flights were purchased before the additional 20% increase in fuel cost. Once these filter out I doubt they'll make the same mistake again.