Losing your guitar by accident is painful at it is. But having it stolen due to negligence can be more painful. Rock Lock is a handy tool designed to stop guitar theft. You can use it to secure your guitar to anything (e.g. amplifiers, drum kits, pipes, and other big objects). The cable stands most simple wire cutters, so unless a thief has a heavy duty cable cutter, you will be safe.
Rock Lock may not completely stop guitar theft but it does make it harder for most folks to pull it off. A useful tool to have for your next live performance.