pull in vs. back in

Why Do People Back Into Parking Spots?
Why Do People Back Into Parking Spots?
Why Do People Back Into Parking Spots?
It's time to talk about a minor pet-peeve that, this time of year, feels less minor.  In fact, it feels like a MAJOR annoyance right now, when my holiday stress level is high.  People who back into parking spaces.  Why do they do it...