I never leave any expensive items in the boat unsecured. I pull the removeable faceplate on the stereo, ipod, anything worth stealing. When at the lake and moored overnight i lock the boards to the racks with cable locks from Master Lock. Wrap it around the boards and tower and click together. In order to get them off you'd have to remove the bindings and for most people that takes too long and requires tools. Of course my boat is also moored 20' out from shore or in a patrolled slip. Been doing it this way for three years without issue.