Abstract: A method of applying a switch guard device to a wall switch to prevent unintentional actuation of the wall switch. The wall switch has an actuating lever extending through an aperture in a switch plate with the switch plate normally being attached to the wall switch on opposite sides of the actuating lever by screw threaded fasteners. The switch guard device is formed from a flexible body portion, initially relatively flat, having a pair of spaced apart apertures for receiving the threaded fasteners. The spaced apart apertures are spaced a sufficient distance that when the threaded fasteners are received by the spaced apertures attaching the body portion to the switch plate, the body portion flexes into an arcuate configuration covering the actuating lever sufficiently to prevent accidental movement of the lever but to allow intentional movement of the lever.