I've seen a couple of threads where there is a brief mention of the potential for theft of a prop - such as discussions on whether to keep the motor/drive in the water or tilted up at the marina. Even more alarming to me was the mention of possible theft of the stern drive, which I assume would mean the boat is out of the water (on trailer) and the concept could therefore include possible theft of an outboard (depending on weight). We trailer our Benny and camp (in our Airstream), which means the boat can spend the night on the trailer at the boat ramp parking area. We also are going to be storing it in a covered (but not enclosed) commercial storage lot where there is easy-to-climb-over fencing around each covered stall and around the facility. I'm a bit concerned about my very shiny $575 piece of stainless steel! I would think that even those who have their own boat house are at risk. My brother, from whom I bought the boat, had his parked where any boater could see the stern drive and the prop from all the way across the lake - and under cover of darkness come and take it. In 11 years nothing happened, but it occurs to me he might have been lucky. I'm thinking of getting a prop lock (http://a.co/a8DEaXG) because of the amount of exposure I'll have on the trailer at campgrounds or even at storage. I may even get the stern drive lock, which operates on the same principal of a keyed nut (http://a.co/coxG54m). I was wondering what other's thoughts and experiences are. Also, I noted that the prop lock doesn't have the safety ring... is that a problem?