I suppose it is easier for your average car thief (or cloner) to sit at the comfort of his/her computer to find a car of their choice to steal and then discover your address by paying some filthy lucre to the DVLA.
Certainly beats hanging around on street corners in all weathers and if by chance the right car comes along, having the bother of following you home.
Or of course they could just drive past and see it parked on your drive