Hard to believe. Sabre/AA/Travelocity travel records share the same central GDS processors, but I assumed that they kept data segregated. In the old days, an airline was only notified of passenger records in which they had an interest, that being, at least one segment was booked on that airline. So, in theory, if a Sabre travel agent booked NW space, a passenger record existed in the Sabre system and the NW res system. I always assumed that AA airline staff could not look at traveler records booked by Sabre that might only have space on their competitors. I do have some familiarity with the Worldspan GDS(NW, Expedia, Orbitz, Priceline, and some small carriers) and I know that there is no sharing of Worldspan agency passenger records with NW unless there is NW or (sometimes) KL space. Things get curiouser and curiouser...