Automatic Transmission Column Shift problems of the 2002 Nissan Xterra

Steering wheel does not lock when ignition is turned off. Ignition can be in off position and keys removed with gear shifter still in "d" drive. I did not know this was not normal until on 7/16/2004 the steering wheel was locked and it took apprx 10 minutes of adjusting wheel and on/off of the brake pedal to get the wheel to unlock. I then read the owners manual and realized I should not be able to remove the keys from the ignition when the gear shifter still in drive. I have done this many times after the 2nd or 3rd I caontacted the dealer to let them know I was not happy with this vehicle as I had to actually run after it at a gas station. The service rep at trophy Nissan said my truck was no longer under warranty but they will look at it and tell me how much it will cost to correct the problem. This is not a warranty issue, this vehicle is clearly defective and very dangerous. Because of this problem I do not allow any family member to drive this truck in fear they will either run over themselves or injury someone else when the truck rolls away.