1. A computer implemented method of controlling use of a mobile communication device, the method comprising:establishing a value corresponding to a particular user of the device;
receiving an indication of at least one triggering condition of the particular user of the device, the at least one triggering condition being based on a level of battery charge;
determining at a plurality of times that the at least one triggering condition has been met based on measurement by the device;
modifying the value based on an aggregating of the determining of the at least one triggering condition has been met at the plurality of times;
determining when the value crosses a particular threshold; and
disabling at least one of an application or a functional component of the device responsive to the value crossing the particular threshold.