all candidates receive their CLASS of email addresses, thus supply does not get demand visa versa.
also its a trust that it is only used for the election and dis-guarded afterwards, as members come and go it would be easy to track if it was being used post-election for ..say......marketing.
also note your phone number is NOT on the list , so if anyone phones you that you have not previously spoken to then it suggests they have researched you via other means.
tim