I always use mine. Sometimes when out screwing around I ride up next to my roommate and turn his kill switch off for him. lol

 

as a biker i never use mine.

as a race marshall I use them alot, first thing to do when a bike is down is flick the switch, even if the engine isnt running, just stops anything unsuspected from happening. Quite often when the bikes go down they can end up on their side, still running, good time to use someone-elses switch!

 

true! the more you use it the faster it will go out but i use mine most of the time. its not a big deal to me, im not lazy but if it duz go out be ready for your headlights to start actin funny cause it uses the switch.