Yes but this keeps honest people honest. If they are going to steal it they will. Even if you have it locked up with a chain. Simple bolt cutter and it's gone.
true, but I still subscribe to the idea that a hidden kill switch would be much more effective and more time consuming for a thief...and take about the same amount of time to install as the keyed switch...
it would take someone a matter of 20 seconds to cut that plastic out with a hole saw and jump the wires behind to disable that ignition switch....
With a hidden switch, they would either have to hunt for the switch, take off the top of the hull, or (which is what I would prob do) cut out the factory ignition and jump it to a source of equivalent voltage....but those things still would take more time...
the other thing, cutting out the factory ignition is going to be an expensive fix for a thief if they want to sell the whole ski, or will deprive them off a valuable part....vs cutting the bottom of the glove box insert which would only require them to replace (or lose the sale of) a very inexpense part....
I agree with chaining down though, easy to take bolt cutters and chop those off...only way to keep them safe is either to restrict access such as a locked garage, boat house, etc etc....and then when you have them out and about, is to make it take as long as possible to start it up (which I think a hidden kill switch would be best for)...of course all this is moot if they have a couple of people and can just carry it off to a truck or trailer...then the only thing that will help would be a hidden gps or locating device that depends on its on battery source...