I like to do a similar thing with online forms that
require your name and
email. I create a throwaway email address and then make up a name and
address. I'm still getting spam offering really great mortgage rates to
someone called David Marquez in Juneau. But I never did get anything for
Consuelo O'Brien of Barrow.
A (mad) friend of mine adds extra middle initials whenever he has to give
his name and address. He then uses them to prove how said details are
being passed arrounf, IIRC, he proved that the UK Electoral Roll was
being used for something it shouldn't be, and ended up taking some group
to court over it (I forget the exact details).
-tony