There's a lot of ways to disable these bikes conveniently. One is to remove the spark: makes them into 500 lbs of stuff that won't ride away, so it has to be picked up and taken. Some of my custom Ignitions provide this (hard to build!), but there are other ways to provide it yourself, like a hidden switch under the locked seat that breaks the Black wire, or Red, or Black/White elsewhere. Mine has dual-layer relays on it, just 'cuz I can do that...someone would have to defeat the Ignition Switch, the Transistorized Ignition's Security Switch, the main relay and the AUX relay to ride mine away. By then, I would probably have come out and clubbed the SOB with a wrench (or worse), then asked him what he thought he was doing...