They'd presumably target cars that don't drive much. (btw anyone can check any car's annual mileage from the number plate using the MOT history lookup)
Can this be done anonymously? Otherwise doing such a lookup creates a paper trail, which is generally bad if you're trying to commit any crime.
Not sure whether it's accessible outside the UK.
(and, it was me who replaced the wiper blades then so I know it was right)