T officials report no complaints whatsoever about CharlieCards failing after just four days, so therefore, it hasn't happened. Plus, anybody who's had problems with a CharlieCard, well, let's just say your trolley doesn't go to the last stop.
Read Mac Daniel's CharlieCard column and let me know if I'm summarizing it correctly. Especially if you are one of the people whose CharlieCards didn't actually stop working on Thursday since you just imagined it. So no point writing to [email protected].
BadTransit takes a more dyspeptic view.