I've disabled my kill switch in order to make it a "kill" switch. Basically, I've mounted an M80 explosive inside the gas tank which is triggered by one of those model rocket ignitors. The ignitor is connected to a safety switch which is disabled when I lock it up and then wired to the kill switch. When the saftey switch is disabled, the kill switch is locked and loaded. When someone steals the bike and rides off I can probably find them by looking for the mushroom cloud. Okay, so I haven't really done this, but thieves deserve this kind of fate. I use a U lock.