> And we can actually be quite sure it was not widely shared at the TSA, because if it had been some asshole would have stolen his Credit Card number.
Except that they're available, in bulk, to whoever administers that database. And a theft or loss of a backup of that database is hideously unlikely to ever be reported, for "national security reasons" but also to reduce bureaucratic business. And given the history of federal agency personal and political fraud against private citizens, especially politically active citizens, it verifies that they have far too much data, far too easily accessed, available at whim for whatever purpose is desired.
Just because "it's boring text" does not mean it's not incredibly useful for political espionage or frame-ups. Please, do not try to claim that it "wouldn't happen here" The abuse of confidential federal information to harass political opponents certainly _has_ happened here, in the McCarthy hunt for Communits, with the Committee to Re-Elect the President in Nixon's presidential reign whose failures cost Richard Nixon his presidency, and with the Valerie Plame affair during George W. Bush's presidency.
The collection and aggregation of "uninteresting" private information or "metadata" represent risks to political careers and private liberty that will not cease simply because "who would care" or "it's dull". It's hardly dull to be able to use someone's personal information and credit card data to track the nature, times, and location of _every purchase_, and have warrant free monitoring of travels and personal business. And there is, effectively, no oversight of such access because it's the NSA: they operate under a tremendous shroud of national security that prevents rational oversight of such sensitive information.