Maybe after World War 3 the new global government will search through the 25 year old database and exterminate all past and present believers of <some religion>.
(Yes, I know, plain text emails to hotmail/gmail recipients would probably be just as bad as plain text private messaging on facebook. Protecting privacy is so bothersome that my efforts are pretty token. But I do try... because I don't comprehend the ramifications of releasing so much information.)