If the flight attendant comes to your seat and says,”happy birthday”, they know more about you than just the day you were born.  The pilot has all sorts of info at about you at their fingertips.   Are you cool with this?   Here’s what the  Wall Street Journal writes.

“Your flight attendant wishes you happy birthday. Is that cute or creepy? Airlines know a lot about you, from date of birth and home address to travel patterns, vacation preferences, beverage purchases and whether your last flight was good or bad. Now the latest generation of hand-held devices used by flight crews has an overhead bin full of information about each passenger. Carriers are using it in an effort to improve customer service. If you order the same drink often, airlines may soon offer it to you before you ask. If you have a tight connection, these tools can let the crew know to speed your exit from the plane. More passenger data can lead to better service, but carriers know that fliers want some limits on how much of their personal information to use.”