Exactly what I'm thinking. I thought this tinfoil hat mentality has died with slashdot. Face it: any e-mail provider can read your e-mail, including the e-mail provider of your recipient. The sysadmin in your office can read your e-mail. Your ISP can read your e-mail even if you host your e-mail server (unless you use https). Same goes for the ISP of the recipient. The only way to be safe was if everyone hosted their own e-mail servers and used PGP/GPG to encrypt their e-mail.
Maybe it's time to stop being paranoid and start concentrating or real problems? Like pondering on how to create an e-book reader that doesn't suck or discovering how to cure AIDS and cancer efficiently?