I am not sure if this has been said already, I did a search and saw nothing on the subject and apologize if it has.
I would like to input a security code to unlock my Garmin 400t when I turn it on. I think it should be on all Garmins. I read somewhere that people break into your car and steel your GPSr and the remote for your garage, start up your GPSr and hit home, now they have your home address and a way into your house.
Just my 2¢
Dave