Theft seems to be a greater problem since we have expanded EU membership. Down on the south coast its outboard motors on boats. They fill up a container and its across the channel before anyone has the chance to stop them. I like the shotgun idea
Normally they go for the big expensive motors. Here the thieves are mainly from ex eastern block countries. They load them in a van and are out of the country within hours. We had one gang arrested for the second time near here. Locking and bolting engines to the boat doesn't stop them, they just use a chain saw and cut out the transom. One lot used the boatyard forklift and calmly worked under the view of the CCTV camera.
We had our 6hp engine stolen between Christmas and New year a couple of years ago. Two weeks later they came back to the port and stole 5 more. The insurance paid about 1 third of the value of a new engine despite it being near new. I now have it bolted and locked to the boat.