frequent flyers beware. all majors keep detailed files on their elite members. that favor you think they did with a waived fee or whatever.....is in your record. at some point they will bring these things up to you if you ask for too much. the data they have is scary. another issue....if you have an unhelpful telephone agent, they will frequently document yur record to protect themselves by claiming you were aggressive or abusive. this "blacklisting" process goes much deeper than just highlighting onboard incidents.