An electronic device includes one or more sensors, a user interface having one or more user interface output devices, and one or more processors operable with the one or more sensors and the user interface. The one or more processors receive, from the user interface, a command to power OFF the electronic device. Upon failing to detect, with the one or more sensors, an authorized user of the electronic device as a source of the command to power OFF the electronic device, the one or more processors disable the one or more user interface output devices while leaving the one or more sensors operational.