I keep my keys in a faraday cage and the sound of a deterrent in the form of a steering lock sounds like a good one, however these arseholes have to move the car on very quickly and nothing sells like a Golf R, M2/3/4, RS whatever and many of the AMG family, demand is high, either as a complete car or for parts, not so much for an "F" car, hence why we don't hear of them being targeted for theft that often, there are obviously other reasons, rarity, a lot of people don't know what they are which all works in our favour, so all in all I don't think our cars are as at risk as some of the others I mentioned.