spotters aren't to blame, for a would be thief it is extremely inefficient to visit bunch of airfields in the country to look for any potential rotax activity (and how do you even tell how many hours they have?). It is clear as a day that G-INFO database is being raked, I only got my G reg plane registered few months ago and every aero shop in the universe is sending me junk mail. CAA should really do a better job protecting this sensitive information