I once went to look at a staff car for sale in the UKicon. The one thing that stood out about it was if you shut any of the doors they automatically locked and so you had to remember to take the keys out of the ignition or you would be locked out. The owner claimed that this was a normal feature because it was a staff car, although I wasn't 100% convinced. Personally I would never remember to always remove the keys from the ignition but this wasn't the reason that I didn't buy the car. Unfortunately it needed a new engine.